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【简答题】
设在15只同类型的零件中有2只是次品,在其中取3次,每次1只,做不放回抽样,则取出次品的只数为1的概率为
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举一反三
【单选题】-My watch is not working. ________? -It's ten past eleven.
A.
What time is it
B.
What's the time
C.
What time is it by your watch
D.
What is time by your watch
【简答题】三菱PLC控制三菱A740。在PLC的输出端子上,是每四个连续的输出端口共同使用一个COM端子。在实训课题(6)中,Y0、Y1、Y2、Y3共同使用一个COM1端子,而Y4使用的是COM2端子,出现上述现象的原因?
【简答题】Using an image of a beetle for the car is not the most original advertising idea, but the advert is fun to watch.
【单选题】—Can you watch TV ________ school nights? —Yes, but I have to be _______ bed ________ ten o’clock.
A.
in; on; by
B.
on; on; in
C.
on, in; by
D.
in; in; at
【单选题】People [ ] watch our advert. No one forces them to press play!
A.
don't have to
B.
mustn't
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