皮皮学，免费搜题
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【单选题】
一批种子的发芽率为75%，每穴播5粒，出苗数为4的概率（）A.
0.3955
B.
0.0146
C.
0.3087
D.
0.1681
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【简答题】ABB的标准I/O板提供的常用信号有哪些类型的信号?
【单选题】听力原文：M: What do you think of the director's annual report? W: I can hardly figure out what it is intended for. What is the woman's response?
A.
She doesn't know its intention.
B.
She can't understand the report.
C.
She doesn't think much of the report.
D.
She doesn't believe the exact figures in it.
【单选题】听力原文：W: Did you hear the weather report for today? W: The pollution's going to be so had they recommend staying indoors. Q: What are speakers discussing? (13)
A.
The weather yesterday.
B.
A polluted river.
C.
Hotel accommodations.
D.
The quality of the air.
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