钢材的伸长率表示( )。A．屈服点 B．冲击韧性 C．塑性变形能力 D．冷弯性能

外耳道棘骨质破坏是哪种中耳病变特征性的CT表现（）

A.渗出性中耳炎

B.获得性胆脂瘤

C.中耳癌

D.恶性外耳道炎

E.肉芽肿性慢性中耳乳突炎

发行公司债券，自中国证监会核准发行之日起，公司应在______个月内首期发行，剩余数量应当在______个月内发行完毕。超过核准文件限定的时效未发行的，须重新经中国证监会核准后方可发行。( )

A．3 6

B．3 12

C．6 12

D．6 24

横拉条直径细至原直径2/3时应补强，细至原直径1/2时应更换。

阅读理解。

     The first day of school we were interested to get to know a new classmate. I looked around when a gentle

hand touched my shoulder. I found a little old lady with a warm smile.

     She said, "Hi! I'm Rose. I'm 87 years old. Can I give you a hug?" I laughed and I heartily responded, "Of

course!"

     "Why are you in college at such a young, innocent (天真无邪的) age?" I asked.

     She jokingly replied, "I'm here to meet a rich husband, get married, have children, and then travel around." 

     "Not seriously," I asked. I was curious why she took on this challenge at this age.

     "I always dreamed of having a college education and now I'm getting one!" she told me. We became instant

friends.

     Over the year, Rose became a campus icon (偶像) and she easily made friends wherever she went. She

loved to dress up and she enjoyed the attention from the other students.

     At the end of the semester, we invited Rose to speak at our football banquet. I'll never forget what she

taught us.

     "We do not stop playing because we are old; we grow old because we stop playing. Here are the secrets to

staying young. You have to laugh and find humor every day. You've got to have a dream. When you lose your

dreams, you die. Unfortunately we have many people like this walking around?" she said.

     "There is a huge difference between growing older and growing up. Anybody can grow older. That doesn't

take any talent or ability," she added. "But growing up requires finding the opportunity in change. Have no

regrets. The elderly usually don't regret what they did, but rather things they did not do."

     One week after graduation that year, Rose died peacefully in her sleep. She taught us by example that _____.

1. Why was Rose in college at 87? Because _____. [ ]

A. she wanted to meet a rich husband

B. she wanted to get married and have children

C. she wanted to travel around

D. she dreamed of having a college education

2. According to the passage, Rose loved to do the following EXCEPT _____. [ ]

A. dress up

B. enjoy the attention from the other students

C. play football

D. make friends

3. According to what Rose said,we can know that to stay young you must not _____. [ ]

A. laugh

B. be humorous

C. have a dream

D. lose your dream

4. According to the last paragraph but one we know _____. [ ]

A. growing older is quite different from growing up

B. growing older needs talent

C. growing up doesn't require ability

D. the elderly usually have no regrets

5. Which of the following can be used to fill in the blank at the end of the passage? [ ]

A. where there is a will, there's a way

B. never too late to learn

C. Study hard and you will be young

D. never too late to be all you can possibly be

对东西向的锋面，当横槽转竖加深时，则锋面将（）移动。

A.加速

B.减速

C.静止少动