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【多选题】
图中两平行直线AB、CD间公垂线的投影。求解公垂线的距离，下列说法哪些是正确的？【图片】A.
利用直角三角形法求解公垂线的距离。
B.
本题利用垂线（距离）的 Z和其水平投影求得。
C.
本题也可以利用垂线（距离）的 Y和正面投影求得。
D.
本题也可以利用垂线（距离） X和侧面投影求得。
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】若String s="hello";String t="hello";char c[]={'h','e','l','l','0'};则下列 表达式返回false?
A.
s.equals(t);
B.
s.equals(new String("hello"));
C.
t.equals(c);
D.
s==t;
【单选题】What happenedin the job market in 2008?
A.
Many companies began to recruit graduates as many as possible.
B.
Almost no recent graduates were needed by companies.
C.
Multiple job choices could be weighed by the recent graduates.
D.
More recent graduates swarmed into the job market than required by companies.
【简答题】In the job market, job seekers need to know how to sell themselves like ________.
【单选题】Jane went to the job market ______ if there's any job opportunity.
A.
seeing
B.
saw
C.
to be seen
D.
to see
【简答题】以下哪些字符数组的定义与 char s[6]="hello";是等价的( )?A. char s[6]={"hello"};B. char s[]={"hello"};C. char s[6]={'h','e','l','l','o'};D. char s[]={'h','e','l','l','o'};
【单选题】用《中国药典》2000年版一部的含量测定法,规定防已在80°C干燥4小时后,含粉防已碱不得少于
A.
0.005
B.
0.036
C.
0.008
D.
0.007
E.
0.002
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