皮皮学，免费搜题
登录
搜题
【单选题】
设A,B是随机事件,P(B)>0,且P(A|B)=0,则以下命题正确的是A.
A与B互不相容
B.
C.
P(A)=0若P(B)=0
D.
A与B可以不互斥
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】Passage Three:Questions 31 to 35 are based on the following passage Cars account for half the oil consumed in the U.S., about half the pollution and one fourth the greenhouse (温室) gases. They ta...
【单选题】passage three:questions 21～25 are based on the following passage. New technology links the world as never before. Our planet has shrunk. It’s now a “global village” where countries are only seconds aw...
A.
Critical.
B.
Prejudiced.
C.
Indifferent.
D.
Positive.
【简答题】平面一般力系的平衡条件是?
【单选题】平面一般力系的平衡条件是()
A.
力系中所有各力在x轴上的投影代数和为零
B.
力系中所有各力在y轴上的投影代数和为零
C.
力系中所有各力在x、y轴上的投影代数和为零
D.
以上说法均不正确
【简答题】Passage Three：Questions 31 to 35 are based on the following passage. German Chancellor (首相) Otto Von Bismarck may be most famous for his military and diplomatic talent, but his legacy (遗产) includes ma...
【单选题】Passage Three Questions 31 to 35 are based on the following passage. “Humans should not try to avoid stress any more than they would shun food, love or exercise.” Said Dr. Hans Selye, the first physic...
A.
the benefits of manageable stress
B.
stay away from
C.
run out of
D.
put up with
【单选题】Passage Three Questions 21 to 25 are based on the following passage. Lead deposits, which accumulated in soil and snow during the 1960's and 70's, were primarily the result of leaded gasoline emission...
A.
the Clean Air Act has not produced the desired results
B.
lead deposits in arctic snow are on the increase
C.
lead will stay in soil and snow longer than expected
D.
the US is the major source of lead pollution in arctic snow
【单选题】平面一般力系的平衡条件是( )。
A.
力系中所有各力在x轴的投影代数和为零
B.
力系中所有各力在y轴上的投影代数和为零
C.
力系中所有各力在x、y轴上的投影代表和分别为零
D.
力系中所有各力在x、y轴上的投影代数和分别为零,力系中所有各力对任一点的力矩代数和等于零。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
