1、题目53:
( )
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1、题目28:已知等差数列{an}中,a1=2,a2=4,则a4=( )
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1、题目8:--The Internet service fees are too high,and the speed is too slow. --That’s why Premier Li Keqiang asks operators(运营商)to provide () Internet.
A. many cheaper and quicker
B. very cheaper and quicker
C. more cheaper and quicker
D. much cheaper and quicker
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1、题目14:在等比数列{an}中,已知a7·a12=5,则a8·a9·a10·a11=( )
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1、题目41:在等比数列{an}中,已知a3·a4=4,则a1·a2·a5·a6=( )
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1、题目24:y=sin4x的周期为( )
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1、题目75:--Do you need more time to complete the task? --Yes.Another ten days () enough.
A. is
B. was
C. are
D. were
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1、题目124:--My aunt said she called you yesterday morning,but there was no answer. --Oh,we were at home.Maybe my husband with my daughter and me () my car in the garden.
A. were washing
B. had washed
C. was washing
D. washed
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1、题目30:The new film The Left Ear" () by Su Youpeng a few months ago who is also a famous singer."
A. is directed
B. was directed
C. directed
D. directs
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1、题目48:cos1800=( )
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