矿产勘查的目的是什么？
矿产勘查的任务是什么？
矿产勘查的基本原则包括（）
矿产勘查的任务是为详查提供基础。（）
矿产勘查的研究方法包括（）
矿石质量特征包括矿石的 、 、 、 、赋存状态、变化及分布特征
资源量类型按照地质可靠程度由低到高可以分为推断资源量、控制资源量和探明资源量。（）
资源量转换为储量时应考虑转换因素。（）
在漫长的地质历史和地壳活动中，相应的岩浆活动具有多期次旋回的特点。
从整个地史发展进程的角度分析外生矿产在不同时代的地层中的分布特征，可以发现外生矿产在时间上的这种不均匀分布也是非常明显的，可以用 来表述，并且不同种类的矿产在成矿期内是有序出现的，构成了所谓的 。
主要外生矿产均分布在沉积区的中间地带。
岩性条件包括
高差不大的低山、丘陵地区，对风化矿床的形成最为有利。强烈切割的高山地区和地形十分平坦的平原洼地，均不利于风化矿床的形成。
控制内生矿床形成的主要地质条件是
世界上的钼矿主要形成于古生代。
以下哪种地质工作不属于地球化学找矿方法（）。
找矿标志据成因划分为
以下哪种地质工作不属于地球化学找矿方法
勘查技术手段选择应该考虑的主要因素是（）
若满足（），称为相依
矿体变化性有定性、定量两种表示方法。（）
两个变量之间的方差成为协方差，两个变量的协方差除以他们的标准差是相关系数
方差是反映 、 的指标
均方差的大小与（）有关
地下坑探工程根据掘进方向可分为水平坑道、垂直坑道、倾斜坑道。（）
坑探工程种类包括地表坑探、地下坑探。
根据钻孔钻进角度不同，可分为（）
钻孔要素：天顶角、倾角、方位角
固体矿产取样的工作环节可分为
什么是坑探工程取样
非样品化验结果检查的种类（b）
化学分析的种类：基本分析；多元素分析；组合分析；合理分析；全分析。（）
允许误差的的计算和处理方法有：据超差率处理、据平均相对误差处理。（）
勘探线剖面图的图面内容有
夹石剔除厚度，主要考虑的因素有哪些？
边界品位是单个样品主要有用组分含量的最低要求。
品位大于最低工业品位的矿石，都属于工业矿体。
最小可采厚度，指在一定的技术经济条件下，矿石质量符合要求时,有工业开采价值的单层矿体的最小可采真厚度要求。
小于可采厚度的矿体，即使平均品位大于最低工业品位，也不能视为工业矿体。
资源储量估算参数主要包括（）。
可根据矿体断面的平均品位，计算矿体平均品位。（）
地质断块法不适用于不适用于褶皱矿体。
露天开采的矿体在开采境界范围外的小矿体不需圈入。
某铜矿体采用200m×100m的网度进行勘查，勘探线间距为
以下哪种地质工作不属于地球化学找矿方法
某铜矿床工业指标为边界品位0.2%、可采厚度1m、夹石剔除厚度2m。该矿床中有一钻孔见矿，经连续取样（采样长度1m），共取得14个样品，它们自上而下的品位是： 0.3%、0.5%、0.6%、0.6%、0.2%、0.1%、0.1%、0.1%、0.2%、0.5%、0.6%、0.2 %、0.5%、0.6%，则可圈出上下两层矿体，这两层矿体的厚度分别为
矿产勘查地质学中，矿体地质研究的主要对象是
均方差的大小与（）有关
矿体边界线的圈定，以下哪一项不属于考虑的因素。
以下哪种工程不属于地表坑探工程？
假设zk5钻孔第二十回次进尺为4米、岩芯长3.6米，岩芯采取率为
某铜矿最低工业品位0.5%，最小可采厚度8米，则最低米百分值为
控制外生矿床形成的主要地质条件是
探槽素描图通常绘制
控制内生矿床形成的主要地质条件是
若满足（），称为相依
我国固体矿产勘查阶段划分为
钻孔按其角度和方位可以分为
从整个地史发展进程的角度分析外生矿产在不同时代的地层中的分布特征，可以发现外生矿产在时间上的这种不均匀分布也是非常明显的，可以用 来表述，并且不同种类的矿产在成矿期内是有序出现的，构成了所谓的 。
资源储量估算参数主要包括（）。
矿体圈定的方法（）。
第四系覆盖较厚的平原地区常用地质填图、土壤地球化学测量、岩石地球化学测量进行找矿。
小于最小可采厚度的矿体，都不是工业矿体。
主要外生矿产均分布在沉积区的中间地带。
坑探工程种类包括地表坑探、地下坑探。
高差不大的低山、丘陵地区，对风化矿床的形成最为有利。强烈切割的高山地区和地形十分平坦的平原洼地，均不利于风化矿床的形成。
在漫长的地质历史和地壳活动中，相应的岩浆活动具有多期次旋回的特点。
资源量类型按照地质可靠程度由低到高可以分为推断资源量、控制资源量和探明资源量。（）
成矿规律主要是研究矿床的时间分布规律、矿床的空间分布规律、成矿物质来源规律和矿床的共生规律。
what is the main content of “theory of machines and mechanis”?
what should students pay attention to in the study of ‘theory of machines and mechanis’?
the study objects of the course ‘theory or machines and mechanis’ are machines and mechanis.
what are the main features of machines?
what are the main features of mechanis?
what are the main features of machines?
what are the main features of mechanis?
the study objects of ‘theory of machines and mechanis’ are mechanis and machines.
what is the difference between a link and a part?
how many frames can exist in a mechani?
what are the composition elements of mechanis?
which ones in the following are not kinematic pairs?
what are the characteristics of kinematic pairs?
which of the following descriptions is the right definition for kinematic diagrams?
the degree of freedom of a mechani is
what is the right expression to determine the degree of freedom for a mechani?
passive degree of freedom refers to
what results in multiple pin joints in a mechani?
redundant constraints refer to
what is the condition to have a determined motion for a mechani?
the composition principle of mechanis refers to
the characteristics of assur groups are
what is the right expression to determine the degree of freedom for a mechani?
lower pairs are kinematic pairs with
passive degree of freedom refers to
redundant constraints refers to
which of the following terms are the proper descriptions of the characteristics for kinematic pairs?
what are the composition elements of mechanis?
the characteristics of assur groups are
this is a lower pair connection
this is a lower pair connection
this is a lower pair connection
this is a lower pair connection
this is a lower pair connection
this is a lower pair connection
for a mechani, when its degree of freedom equals to the number of driving links, it has determined motion.
in the calculation of degree of freedom, we should not consider redundant constraints.
what are the methods of kinematic ysis?
characteristics of instantaneous center of velocity include
"the instantaneous center of velocity of the two links that form a higher pair must be located at the contact point of the two links." is this statement correct?
the instantaneous center of velocity of two links that form a turning pair is located at
the instantaneous center of velocity of two links that form a sliding pair is located at
the instantaneous center of velocity of two links that form a higher pair is located__
instantaneous center p13 is the point at which link () and link () share the same velocity, including the magnitude and direction
what are the methods used to conduct kinematic ysis?
characteristics of instantaneous center of velocity include
"the instantaneous center of velocity of the two links that form a higher pair must be located at the contact point of the two links." is this statement correct?
which is the correct definition of the coefficient of travel speed variation?
in order to make a mechani realize quick-return motion, what is the requirement for the value of the coefficient of travel speed variation k?
what conditions must be met for a linkage mechani to have dead points?
the basic form of the planar linkage mechanis is _____.
what is the definition of imbalance angle?
in the linkage shown in the figure, it is known that lab = 160mm, lbc = 260mm, lcd = 200mm, lad = 80mm. the link ab is taken as the driving link and it rotates at a constant speed clockwise. the coefficient of travel speed variation k equals to ___.
in the four-bar linkage shown in the figure, it is known that lab = 100mm, lbc = 300mm, lcd = 200mm, and lad = 350mm. link ab is taken as the driving link. what is the minimum tranission angle γmin of the linkage?
when a linkage mechani is in its ‘dead point’ position, the pressure angle α = ( )
given a crank-slider linkage abc, the stroke of the slider is h = 100mm, eccentricity is e = 15mm, coefficient of travel speed variation is k = 1.2. please design this crank-slider linkage and determine the crank ab length lab and coupler bc length lbc.
what are the characteristics of linkage mechanis?
“dead points” in mechanis could be practically useful or harmful.
in the four-bar linkage shown in the figure, ad is known as the frame, lbc = 50mm, lcd = 35mm, and lad = 30mm. if the mechani is a crank-rocker linkage, and ab is crank, then the maximum length labmax of ab is ____mm.
in the offset crank-slider linkage shown in the figure, it is known that a = 100mm, e = 40mm. if ab can be taken as a crank, the minimal length of link b is ___ mm.
which of the following links belong to cam mechanis?
how to keep a cam in continuous contact with the follower?
what’s the definition of the base circle for a cam mechani?
in a work cycle of a cam mechani, which of the following phases are essential?
which of the following motions will cause rigid impulses in a cam mechani?
the motion parameters of a follower include:___
which of the following motions will cause flexible impulse in a cam mechani?
which of the following motions exhibit no impulse in a cam mechani?
‘the follower motion depends on the cam profile’. is this statement correct?
which of the following is the basic method used in designing cam profiles?
what is the relationship between the theoretical profile and the actual profile of the cam?
when the base circle of a cam disk becomes larger, the pressure angle of the mechani _____.
the pressure angle of a cam mechani is___.
cam mechanis can be classified into different types according to ( ).
the cam mechanis can also be classified into different types according to ( ).
which of the following phases must be included in a work procedure of cam mechanis ( ).
what will happen if the radius of the base circle and the radius of the roller in a cam mechani are not designed properly?
what are the features of gear mechanis?
conjugate gear profile refers to
the shape of the gear involute profiles depends on the
features of involute curves include
what is the function of the reference circle?
what are the basic parameters of involute standard spur gears?
which of the basic parameters of involute standard spur gears have standard values
compared with gears, racks have characteristics of
what is the correct mating condition for involute spur gears?
what is the continuous mating condition?
what is the relationship between single tooth mating zone length (ls) and base circle pitch (pb) of an involute standard spur gear with contact ratio =1.4
what is the relationship between double teeth mating zone distance (ld) and base circle pitch (pb) of a involute standard spur gear with contact ratio =1.4
when a pair of involute spur gear is in tranission and the contact ratio equals 1, the length of actual meshing line is equal to
what is the correct mating condition for involute standard spur gears?
what is the correct installation condition for involute standard spur gears?
what is the reason for undercutting in the generating method of gear machining?
methods of machining for gears include
what are the advantages of modified gears?
increase helix angle may result in
compared with standard spur gears, helical gears have advantages of
the standard parameters of bevel gears are defined at____?
the shape of the gear involute profiles depends on the
on the involute profile, pressure angle on the ( ) circle is zero, pressure angle on the ( ) circle is the largest?
the continuous meshing condition for standard involute spur gears is
contact ratio ε of standard involute spur gears equals to______
what is the correct meshing condition for a pair of involute helical gears?
what are the basic parameters of involute standard spur gears?
what are the correct installation conditions for standard involute spur gears?
a gear with a pressure angle α=15° can mesh with a gear with pressure angle α=20°.
the classifications of gear trains include_____.
the combined gear trains are composed of_____?
what are the conditions need to be satisfied when determining the number of teeth of each gear in an epicyclic train?
what applications do the gear trains have?
the figure shows a hand-operated lifting mechani. given the number of teeth, z1 = 20, z2 = 50, z2’ = 15, z3 = 15, z3’ = 1, z4 = 40, z4’ = 18, z5 = 54. then, the gear ratio i15 is ___.
composition of ratchet mechanis includes
ratchet mechanis can be classified according to
usage of ratchet mechani includes
motion parameter k of the geneva mechani is defined as
the geneva mechani consists of
types of geneva mechani include
features of geneva mechani include
increasing the number of slots will result in
intermittent gear mechani can be classified as
the driving gear of an intermittent gear mechani must be incomplete gear
what are the composition of screw mechanis?
properties of screw mechanis are
composition of universal joint includes
the number of slots z should be greater or equal to
what is the purpose of machinery balance?
what are the disadvantages of unbalanced machinery?
types of machinery balance include
the methods to evaluate the allowable unbalance of a rotor include
the purpose of balance for mechanis is to eliminate
what need to be performed to have a fully balanced mechani?
what is the purpose to conduct balancing for mechanical systems?
what is the main purpose of kinetics ysis of mechanical systems?
what are the basic periods of machine running?
what may be the types of the driving force acting on the machine?
what may be the types of the resistance acting on the machine?
the figure shows the diagram of the equivalent driving torque med and the equivalent resistance torque mer of a machine whose moment of inertia je is constant. at which angular position, the angular velocity of the equivalent link reaches its maximal value ωmax.
the figure shows the diagram of the equivalent driving torque med and the equivalent resistance torque mer of a machine whose moment of inertia je is constant. at which angular position, the angular velocity of the equivalent link reaches its minimal value ωmin.
what causes periodic speed fluctuation in machine operation?
what are the three periods in the running of a mechanical system?
what is the right expression to determine the degree of freedom for a mechani?
how many frames can exist in a mechani?
what is the condition to have a determined motion for a mechani.
what is the definition of imbalance angle?
the law of gearing can be expressed as ___.
what is the function of the reference circle?
motion parameter k of the geneva mechani is defined as ___.
what is the relationship between the friction angle φ and coefficient of friction f?
what is the self-locking condition of a turning pair?
what is the relationship between the total efficiency of a series mechanical system and the efficiency of each subsystem?
which of the following features are shared by machines and mechanis?
what are the composition elements of mechanis?
characteristics of instantaneous center of velocity include ___.
which of the following links belong to cam mechanis?
what are the correct installation conditions for standard involute spur gears?
methods of machining for gears include
usage of ratchet mechani includes
what need to be performed to have a fully balanced mechani?
for a mechani, when its degree of freedom equals to the number of driving links, it has determined motion.
calculate the degree of freedom in this mechani. f=______?
calculate the degree of freedom in this mechani. f=________?
in the offset crank-slider linkage shown in the figure, it is known that a = 100mm, e = 40mm. if ab can be taken as a crank, the minimal length of link b is ___ mm.
in the gear train shown in the figure, the numbers of teeth are z1=20, z2=30, z3=z4=z5=25, z6=75, z7=25, na=100r/min (the directions are shown in the figure). calculate the value of nb=_______ r/min?
输出“hello world”
给定： int a,b; 以下哪些scanf的使用是正确的？
以下哪些是有效的变量名？
给定： int a,b; scanf("%d %d", &a, &b); 则以下哪些输入方式是正确的？
给定以下代码段： int a,b=0; 则a的初始值是0
写出下式的运算结果： 10/3.0*3 （如果认为结果是浮点数，请以小数点后一位小数来表示）
写出下式的运算结果： 10/3*3.0 （如果认为结果是浮点数，请以小数点后一位小数来表示）
写出以下代码执行后，t1和t2的值，以空格隔开： int a=14; int t1 = a ; int t2 = a;
写出以下表达式的结果，结果之间间隔一个空格： 6 5 / 4 - 2 2 2 * (2 * 2 - 2) % 2 / 3 10 9 * ((8 7) % 6) 5 * 4 % 3 * 2 3 1 2 (3 4) * ((5 * 6 % 7 / 8) - 9) * 10
逆序的三位数
以下语句是否可以通过编译： if ( 1<=n<=10 );
以下语句是否表示n属于[1,10]： if ( 1<=n<=10 );
写出程序的输出结果： int i,j,k; i=5; j=10; k=1; printf("%d", k>i
写出程序的输出结果： int i,j,k; i=2;j=3; k = i*j==6; printf("%d\n", k);
写出程序的输出结果： int i,j,k; i=3;j=2;k=1; printf("%d", i
以下哪个循环和其他三条循环不等价（假设循环体都是一样的）？
while循环的条件满足的时候循环继续，而do-while的条件满足的时候循环就结束了
以下代码片段执行结束后，变量i的值是多少？int i =10; while ( i>0 ) { i /=2; }
以下代码片段执行结束后，变量i的值是多少？int i = 1; do { i = 5； } while (i<17);
以下代码段的输出是什么？for ( int i=10; i> 1; i /=2 ) { printf("%d ", i ); }
写出程序的输出：int i=1; switch ( i%3 ) { case 0: printf("zero"); case 1: printf("one"); case 2: printf("two"); }
以下哪种运算能从变量x中取得十进制最低位的数字
当需要累加一些值的时候，用来记录累加结果的变量应该被初始为：
以下代码段的输出是： int sum = 0; for ( int i=0; i<10; i ) { if ( i%2 ) continue; sum = i; } printf("%d\n", sum);
以下代码段的输出是： int sum = 0; for ( int i=0; i<10; i ) { if ( i%2 ) break; sum = i; } printf("%d\n", sum);
素数和
念整数
以下哪句不是正确的函数原型？
以下哪个函数的定义是错误的？
对于不返回值而且只有一个int类型的参数的函数，以下哪些函数原型是正确的？
以下程序的输出是什么？void swap(int a, int b); int main() { int a = 5; int b = 6; swap(a,b); printf("%d-%d\n", a, b); return 0; } void swap(int a, int b) { int t = a; a = b; b = t; }
高精度小数
若有定义： int a[2][3]; 则以下选项中不越界的正确的访问有：
以下程序片段的输出结果是：int m[][3] = {1,4,7,2,5,8,3,6,9,}; int i,j,k=2; for ( i=0; i<3; i ) { printf("%d", m[k][i]); }
假设int类型变量占用4个字节，定义数组 int x[10] = {0,2,4}; 则x在内存中占据几个字节？
若有： int a[][3] = {{0},{1},{2}}; 则 a[1][2] 的值是？
多项式加法
鞍点
对于：int a[] = {5, 15, 34, 54, 14, 2, 52, 72}; int *p = &a[5]; 则： p[-2]的值是？
如果：int a[] = ; int *p = a; 则以下哪些表达式的结果为真？
以下变量定义： int* p,q; 中，p和q都是指针。
对于：int a[] = {5, 15, 34, 54, 14, 2, 52, 72}; int *p = &a[1]; 则： p[2]的值是？
在c语言中，字符型数据在内存中的存储形式是
在c语言中，十进制数47可等价地表示为
设有定义：int x=12,n=5; 则表达式 x%=(n%2) 的值为
设有定义语句：char str[][20]={,"beijing"，"石油大学"},*p=str; 则printf("%d\n",strlen(p 20)); 输出结果是
已定义以下函数: fun(int *p) { return *p; } 该函数的返回值是
c语言中,函数返回值的类型是由
有以下函数定义： void fun( int n , double x ) { …… } 若以下选项中的变量都已正确定义并赋值，则对函数fun的正确调用语句是
以下选项中不能正确赋值的是
若有以下定义：char s[20]= "programming"，*ps=s；则不能代表字符g的表达式是
当对两个字符串进行比较时，应该使用的函数是
若i为整型变量，则以下循环的次数是
以下关于数组的描述正确的是
以下能正确定义数组并正确赋初值的语句是
设有定义 int a[ ]={1,5,7,9,11,13}, *p=a 3; 则*(p-2) , *(a 4) 的值是
用数组名作为函数调用时的实参，则实际传递给形参的是
已知char b[5],*p=b; ，则正确的赋值语句是
以下叙述中不正确的是
当对两个字符串进行连接时，应该使用的函数是
有如下定义：long m；char c；float x；double y；则表达式c m*x/y的值的类型是
从变量的作用域来分，可分为全局变量和局部变量，形参是
给出以下定义: char x[ ]="abcdefg"; char y[ ]={'a','b','c','d','e','f','g'};
要求下面的程序运行后，显示如下结果： 2 10 4 6 1 5 2 3 2 4 7 8 5 1 3 2 则程序中的划线处应填入_______. #include void main( ) { int a[4][4]={ ________ }; int i,j; for(i=0;i<4;i ) {for(j=0;j<4;j ) printf("m",a[i][j]); printf("n");} }
若有说明:char c[10]={'e','a','s','t',''};，则下述说法中正确的是__________。
以下定义语句中，错误的是_______。
对于如下变量定义及初始化，与 m = n 等价的表达式是________ int m, n = 5, *p = &m;
执行以下程序段后，*p 的值为_______。 int m = 1, ∗p = &m, *q; q = p; *q = 2;
单词长度
gps数据处理
最早获得商用的3d打印技术是以下哪一种（ ）
以下不是3d打印技术优点的是（ ）
以下不是3d打印技术需要解决的问题是（ ）
最早商用的3d打印技术出现在什么时候（ ）
各种各样的3d打印机中，精度最高、效率最高、售价也相对最高的是（ ）
1.lom打印技术的缺点不包括以下哪一项
2.3dp技术的缺点不包括以下哪一项
3.sla 技术的优势不包括以下哪一项
4.对光敏树脂的性能要求不包括以下哪一项
5.fdm技术的优点不包括以下哪一项
1.以下不是促进3d打印技术在医疗领域应用的方法是（）
2.3d打印技术在建筑行业的应用中，目前使用最广泛的领域是（）
3.创新是以新思维、新发明和新描述为特征的一种概念化过程。以下不是创新三层含义的是（）
4.3d打印技术在医疗领域应用的四个层次特点中不包括以下哪个（）
5.以下哪种3d打印技术在金属增材制造中使用最多（）
下列哪个不是常用的三维cad软件（ ）。
solidworks零件建模过程的第一步为（ ）。
计算机辅助设计就是利用计算机及其图形设备帮助设计人员进行设计工作，简称（ ）。
solidworks零件建模的步骤会记录在( )中？
solidworks实体特征分为草图特征和（ ）特征二种。
flashprint通过（ ）—偏好设置菜单开启专家模式。
使用pla材料打印，平台温度一般设置为（ ）度。
fdm打印中，（ ）填充形状的强度最高。
flashprint是（ ）公司的fdm切片软件。
镂空3d模型可以减少成本和避免（ ）。
chitubox制作镂空模型后，应做（ ）处理，以方便模型内部树脂排出。
下列哪项不是fdm打印翘边的原因（ ）。
下列哪些是fdm打印机喷头不吐丝的原因（ ）。
闪铸flashforge creator pro打印机使用（ ）卡传输切片文件。
为了使模型更好地粘贴在fdm打印机的平台上，以防止翘边，一般会在平台上贴（ ）。
闪铸flashforge creator pro打印机耗材直径为（ ）毫米。
lcd光固化打印机料槽上需安装透明的( )。
斯太克lcd光固化打印第一次调平后，可通过左侧的（ ）螺丝调节打印平台与lcd屏幕之间的间距。
1.以下是sla技术特有的后处理技术是（）
3.3dp 打印技术的后处理步骤的第一步是（）
4.目前fdm常用的支撑材料是（）
5.清洗刚打印的sla模型时，应将模型放入( )或洗洁净水中浸泡5-10分钟。
1.以下不是3d打印技术优点的是
3d打印对产品（ ）影响较小。
sla技术使用的原材料是
目前fdm常用的支撑材料是
3d打印的模型必须是封闭的，rhina软件中可用（ ）工具检测模型是否封闭。
3dp技术使用的原材料是
以下是sla技术特有的后处理技术是
fdm 3d打印技术成型件的后处理过程中最费时费力的步骤是
使用pla材料打印，平台温度一般设置为（ ）度。
以下哪种3d打印技术在金属增材制造中使用最多
sls技术打印的金属零部件致密度不能达到100%
喷头内出现碳化物、耗材卡丝是fdm打印机喷头不吐丝的重要原因。
lcd光固化打印机料槽上需要贴美纹纸。
3d打印技术目前可以打印航空发动机的所有零部件。
皮肤表皮层由外到里依次是
下列哪项中全是原发皮损
开放式湿敷的主要目的不包括
皮肤含水量占人体总含水量的比例是
血管性疾病主要选用
大疱性脓疱疮的主要致病菌是
丹毒治疗的首选药物是
hsv经皮肤黏膜破损处进入机体后可潜伏于
急性接触性皮炎的典型表现
慢性湿疹的典型表现是
药疹的诊断主要依据
急性荨麻疹的典型皮损是
以下哪种水疱是大疱性类天疱疮的水疱表现
大疱性类天疱疮患者血清中与瘙痒、高嗜酸性粒细胞相关的抗体为
糜烂面上渐出现肥厚的肉芽，并可布满小脓疱，好发于皱褶部位的天疱疮是
以下不属于红斑鳞屑性皮肤病的是
sle皮损好发部位是
治疗sle主要药物是
关于皮肌炎的一般治疗，下列哪项说法不正确
诊断皮肌炎的标准不包括
痤疮按照病情严重程度可分为几级
关于斑秃,下列哪项描述不正确
白癜风属于
雀斑与雀斑样痣的鉴别中符合雀斑的是
pautrier微脓肿的说法哪项正确
bcc最常见的临床类型是哪一型
bcc的临床表现不包括
扁平湿疣和尖锐湿疣的鉴别诊断最为简单的方法是
尖锐湿疣好发于
病原体是
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