试题与答案

已知θ为第四象限角,tan(π+θ)=-2.(1)化简tan(π-θ)sin(π

题型:解答题

题目:

已知θ为第四象限角,tan(π+θ)=-2.
(1)化简
tan(π-θ)sin(
π
2
-θ)
cos(-θ-π)sin(-5π+θ)

(2)求(1)中式子的值.

答案:

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C

Attitude isnt quite everything when it comes to being successful, but attitude plays a part in every stage of your life. A poor attitude gets more people fired than any other single factor, and a good attitude gets people jobs and helps them keep those jobs more than any other factor.

Your attitude affects many people, from your family to the stranger on the street corner. Your attitude is particularly important when you face seemingly hopeless situations. Losing a job or friend because of a poor attitude is unfortunate -especially because a bad attitude can be fixed.

You can find at least two ways to look at everything. A pessimist ( 悲观主义者) looks for difficulty in the opportunity, while an optimist looks for opportunity in difficulty . A poet of long ago put the difference between optimism and pessimism this way: Two men looked out from prison bars -one saw mud; the other saw stars.

Unfortunately, many people look only at the problem and not at the opportunity that lies within the problem. Many employees complain about the difficulty of their jobs, for example, not realizing that if the job were simple, the employer would hire someone with less ability at a lower wage. A small coin can hide even the sun if you hold the coin close enough to your eye. So when you get too close to your problems, to think objectively(客观地 ) about them, try to keep in mind how your vision can be obstructed. Take a step back, and look at the situation from a new angle.

You can’t do anything to change the fact that a problem exists, but you can do a great deal to find the opportunity within that problem. You’re guaranteed a better tomorrow by doing your best today and developing a plan of action for the tomorrows that lie ahead. Just remember to maintain a positive mental attitude.

64. What does the author mean by saying the first sentence in Paragraph 1?

A. If you have a good attitude, you will be successful.

B. Your attitude makes a great influence on your life.

C. Your attitude has nothing to do with your success.

D. Your success is very important to your life.

65. In Paragraph 3, the author shows us_________.

A. two ways to look at everything      B. the definition of pessimist and optimist

C. the ways to look for opportunity     D. the ways to look out from prison bars

66. The author mentions the example of many employees in Paragraph 4 to tell people to_____.

A. ignore the problem               B. look for opportunity in the problem

C. wait for the problem to be solved    D. make their jobs easy to do

67. The underline word “obstructed” in Paragraph 4 probably means________.

A. blocked         B. dropped          C. improved         D. Shared

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