下列中，影响企业价值的因素有（）。A、经营风险 B、资本结构 C、通货膨胀 D、投资报酬率

阅读理解。

Dear friends,

    I’m a middle school student. I work hard and I’m good at studying, but I feel unhappy all day, because

I have some problems. I am always stressed out(有压力的), because my parents and teachers all hope

that I can go to a very good university. I have to study from morning to night. On weekends, my parents

don’t let me meet friends or talk with friends on the phone. I can’t play computer games, either. They ask me to have piano lessons every Sunday afternoon. They don’t care whether (是否) I like it or not. Having lessons , doing homework and practicing the piano are all my life. I find it difficult to get relaxed. I really

want to have time to do the things I like , but I don’t know what to do. Can you help me?

                                                                                                                                             Yours,

                                                                                                                                             A lonely boy

1.The boy always feels _______.

A. excited

B. angry

C. happy

D. stressed out

2. His parents want him to_______.

A. live in the school

B. keep healthy

C. leave school

D. go to a good university

3. The boy _______ on weekends.

A. must practice the piano

B. can meet friends

C. can talk on the phone

D. can play computer games

4. The underlined word “ care ”means_______.

A. 改变

B. 关心

C. 打乱

D. 记录

5. Which of the following is NOT TRUE ?

A. The boy works hard.

B. The boy is good at studying.

C. They boy doesn’t have to study all day.

D. The boy can play the piano well.

0.589÷1.3的商保留一位小数约是______，保留两位小数约是______．

ICRP1990年建议书为职业人员建议的全身有效剂量平均每年限值是（）。

A.5mSv

B.50mSv

C.100mSv

D.10mSv

E.20mSv

新闻传播的基本特点是什么？

变压器引线长短应适宜，不应有扭曲和应力集中。