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【单选题】
对于正偏态分布的总体，当样本含量足够大时，样本均数的分布近似为（）A.
正偏态分布
B.
负偏态分布
C.
正态分布
D.
t分布
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皮皮学刷刷变学霸
举一反三
【单选题】---Have you finished reading Gone With the Wind? ---No, I_________ my homework all day yesterday.
A.
was doing
B.
would do
C.
had done
D.
do
【简答题】人的信息输出主要包括 2 大类: 言语输出 、 。
【单选题】I ___________ in the street when I met an old friend of mine yesterday.
A.
walked
B.
was walking
C.
has walked
D.
had walked
【单选题】The inner connection for the entire area _____when there was a sudden power cut yesterday.
A.
lost
B.
was lost
C.
had lost
D.
had been lost
【简答题】如何理解科学、技术的涵义？
【单选题】It __________ sunny today, but it __________ cloudy yesterday. [ ]
A.
is, is
B.
was, was
C.
is, was
D.
was, is
【单选题】—Were you at home at 9:00 pm yesterday? — Yes, I _______ for a call at that time.
A.
was waiting
B.
am waiting
C.
will wait
D.
waited
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