4.直线上有A、B、C三点,如果B分有向线段AC的比为-
,则
A.B是线段AC的中点
B.A是线段BC的中点
C.C是线段AB的中点
D.B是线段AC的三等分点
答案:B
3.tanx=2,则
的值是( )
A.
B.
C.
D.![]()
答案:C
2.如果α、β都是第二象限的角,且α>β,那么sinα与sinβ的大小关系是
A.sinα>sinβ B.sinα<sinβ
C.sinα=sinβ D.大小关系不定
答案:D
1.已知:a、b、c为三个向量,下列命题中正确的是
A.如果|a|=|b|,那么a=b
B.a-b=b-a
C.|a+b|≤|a|+| b |
D.(a·b)·c=a·(b·c)
答案:C
100.My boys! You are too shy. You should have more confidence in ______.
A. you B. yourselves C. yourself D. themselves
1-5CBDAA 6-10AACAB 11-15ACACA 16-20DBDBB 21-25CCCDD 26-30ADAAC 35-40BACBC 41-45BBDBD 46-50CABCA 51-55DCACD 56-60ACAAC 61-65DADAA
66-70BCCAC 71-75ADCCA 76-80CBBCA 81-85CDCDA
86-90DDBBB 91-95BABBD 96-100BCCAB
98.--Do you know Jim quarreled with his wife?
--I don’t know. _____.
A.I don’t care also B. So do I C. Neither do I D. too
gratulations _____ you _____winning the competition!
A. to, on B. for, for C. for, on D. to, on
97.Tom hasn’t phoned us for a long time. What do you suppose _____ to him?
A. was happening B. to happen C. has happened D. happened
96.Look______! There’s a train coming.
A. at B. out C. around D. over
95.His wife died and ______ him nothing but two sons.
A. offered B. gave C. sent D. left
94.It takes my daughter about an hour to practice playing _____piano after ____ supper every day.
A. the, the B. the, / C. /, / D. /, the
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