红细胞膜上的主体蛋白又称为()A．膜蛋白 B．外源性蛋白 C．血影蛋白 D．转运蛋白

Mr. Wise,

I am a slow（迟钝的）student. Most of my classmates are much better than me. So I usually get worried. I spent much time studying for the tests, but I can’t get good grades（分数）. Sometimes my father gives me some help. He tells me not to worry about it. But it doesn’t work. What do you think I should do?

Xiaoming

Dear Xiaoming,

Many famous people were not so good when they were young. Edison, a famous scientist(科学家), did badly in his studies when he was a 12-year-old boy. But he did a lot for the people in the world at last. When I was at your age, I didn’t do well at school. But I kept working hard and I succeeded(成功) at last. You should take it easy and try your best. Tomorrow is another day. I believe you can do better.

Mr. Wise

小题1: Xiaoming feels worried because         .

A. he has a headache

B. he doesn’t want to work hard

C. he is not as good as（像……一样好）most of his classmates

小题2: Xiaoming wrote this letter to          .

A. ask for some help

B. find a pen pal

C. tell his father his problem

小题3:Mr. Wise wrote about a famous person to         .

A. make Xiaoming angry

B. make Xiaoming feel better

C. show how much he knows

小题4:In Mr. Wise’s letter, “tomorrow is another day” means         .

A. there are a lot of hopes in our lives

B. one can get good grades tomorrow

C. tomorrow is the same as today

小题5: From the second letter, we know Mr. Wise may be           before.

A. a doctor             B. a scientist          C. a slow student

美国国务院的白皮书说：中华民国政府的失败，“不是因为援助不够，……中国人心掌握在 * * 党人手中。”下列说法与之意思最为相近的是（ ）

A．李大钊“试看将来的环球，必是赤旗的世界！

B．毛 * * ：十月革命一声炮响，给我们送来了马克思列宁主义。

C．彭德怀：几百年来，西方国家只要在东方海岸上架几门大炮就可侵占一个国家的历史一去不复返了。

D．陈毅：淮海战役是人民群众用小推车推出来的。

胎儿中枢神经系统畸形常见的有①脑积水②无脑儿③脑脊膜膨出④脊柱裂⑤脑膜膨出

A．①②

B．①②③

C．①②③④

D．①②③④⑤

E．①②④

对建筑物的寿命来讲，其经济寿命与自然寿命的大小关系是( )。

A．经济寿命＞自然寿命

B．经济寿命＝自然寿命

C．经济寿命＜自然寿命

D．以上都有可能