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Section A 听力原文:M: I have passed the test of spoken English and I wonder if I can get the job of the teaching assistant. W: Yes, certainly. But if only you had sent in your application in time. Q: What does the woman imply? (1)
A.
The man is not suitable for the position.
B.
The job has been given to someone else.
C.
She hadn’t received the man’s application.
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【单选题】40W,60W和100W三只灯泡串联接在220V的电源上,灯的额定电压220V,它们的发热量由大到小排列为()。
A.
100W、60W和40W
B.
40W、60W和100W
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100W、40W和60W
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【单选题】额定电压都为220V的40W、60W和100W三只灯泡串联在220V的电源中,它们的发热量由大到小排列为( )。
A.
100W,60W,40W
B.
40W,60W,100W
C.
100W,40W,60W
D.
60W,100W,40W
【单选题】In his ______ to further his knowledge of the universe, man has now begun to explore space.
A.
attempt
B.
expedition
C.
trial
D.
chase
【单选题】抽取一个容量为100的随机样本,其均值为 81,标准差为12。总体均值的99%置信区间为
A.
81±1.97
B.
81±2.35
C.
81±3.1
D.
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【单选题】抽取一个容量为100的随机样本,其均值为 =81,标准差s=12。总体均值μ的99%的置信区间为( )。
A.
81±1.97
B.
81±2.35
C.
81±3.10
D.
81±3.52
【单选题】额定电压都为220V的40W、60W 和100W三只灯泡串联接在220V的电源中,它们的发热量由大到小排列为( )。
A.
100W,60W,40W
B.
40W,60W,100W
C.
100W,4OW,60W
D.
60W,100W,40W
【单选题】额定电压都为220V的40W、60W和100W三只灯泡串联在220V的电源中,它们的发热量由大到小的排列为()。
A.
100W、60W、40W
B.
40W、60W、100W
C.
100W、40W、60W
D.
60W、100W、40W
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