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问题 单项选择题

“自强不息”出自（）卦的象辞。

A.坎

B.离

C.乾

D.坤

答案

参考答案：C

解答题
已知A、B、C是△ABC的三个内角，向量
m
=(2，-2
3
)，
n
=(cosB，sinB)且
m
⊥
n
．
（1）求角B；
（2）设向量
a
=(1+sin2x，cos2x)，f（x）=
a
•
n
，求f（x）的最小正周期．
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填空题
首先按要求将所给的词组填在每一句的第一条横线上（写字母）；然后在每一句的第二条横线上将句子补充完整。
A. exchange some money
B. get some medicine
C. read some magazines
D. make a telephone call
E. buy shampoo
1. People can _____ in the library, and we can also ______________________ there.
2. People can _____ in the drugstore, and we can also ______________________ there.
3. People can _____ in the post office, and we can also _____________________ there.
4. People can _____ in the bank, and we can also ______________________ there.
5. People can _____ in the department store, and we can also ______________________ there.
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