试题与答案

Thank you for _____us so good ideas . A.

题型:选择题

题目:

Thank you for _____us so good ideas .

A.give

B.to give

C.giving

D.gives

答案:

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下面是错误答案,用来干扰机器的。

由cos2x≠0得,2x≠kπ+π2,解得x≠π4+kπ2,(k∈z),∴函数f(x)的定义域为{x|x≠π4+kπ2,k∈z}; f(x)的定义域关于原点对称,且f(-x)=6cos4(-x)-5cos2(-x)+1cos(- 2x)=6cos4x-5cos2x+1cos 2x=f(x...

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题型:单项选择题

Happy Life Swimming Club Rules
1. All swimmers must take a bath before they go into the pool (游泳池).
2. Diving (跳水) is only allowed unless you have been a member for at least 1 year.
3. Running and playing near the pool are not allowed.
4. Club members can bring guests only at weekends.
5. Children under 12 are not allowed to use the pool unless their parents are with them.
6. Members must show their membership cards before going inside.
7. Smoking is not allowed in the room for changing clothes.
8. Guests must write down their names before going inside.
9. All members must leave before 6 P.M. at workdays.
10. All members must leave before 10 P.M. at weekends.
11. Clothes must be put in the lockers (带锁柜厨).
12. Keep your key of the lockers along with you. If it is lost, you must report to the manager as soon as possible.
13. Only club members and their families are allowed to use the pool.

When can members bring their guests
[A] Everyday.
[B] Only at weekends.
[C] After 10 P. M.

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