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【单选题】
表示正态分布的资料中数据的离散程度最常用的指标为A.
mean
B.
varianee
C.
percentile
D.
standard deviation
E.
coefficient of vailation
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举一反三
【单选题】_____ the Internet is of great help, I don't think it's a good idea to spend too much time on it.
A.
If
B.
Because
C.
While
D.
As
【单选题】If John had told me in advance, I ______ him at the airport.
A.
would meet
B.
will meet
C.
am going to meet
D.
would have met
【简答题】I don't think it's a good idea to wait another month. We need to launch our winter collection _______ than our competitors.
【单选题】John told me to __ ______ the pictures __ _______ tomorrow.
A.
take; here
B.
bring; there
C.
taking; there
D.
bring; here
【单选题】I don't think it's a good idea ______ a cup of coffee before you go to bed.
A.
drink
B.
drank
C.
drunk
D.
to drink
【单选题】—Betty told me the last mountainous bike you preferred to yesterday was bought by John. —Oh, my! How I regret that I didn’t buy ______.
A.
that
B.
such
C.
one
D.
it
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