图3（a）为在车床上车削光轴的示意图。工件用三爪卡盘装夹一端。加工后，发现工件有如图

中央电视台与地方电视台平均每套节目的自办时间之比约为（）。

A．20：9

B．12：9

C．1：72

D．1：160

一根绳子长24m，对折三次后，每段长（　　）

A．12m

B．8m

C．4m

D．3m

红细胞唯一的能量来源是（）

A.糖酵解

B.糖的有氧氧化

C.磷酸戊糖途径

D.2＇3＇-BPG旁路

E.糖醛酸途径

（　　　　）を　つけたので　へやの　なかが　すずしく　なりました。

A．ストーブ

B．クーラー

C．ガス

D．ガラス

阅读理解。

     Dr. Sylvia Earle wants you to stop eating fish. It's not because fish are endangered,though wild

fish stocks in many oceans are very low. It's not because they're bad for you, though fishin many

areas are exposed to poisonous substances in the water. It's because they're smart.

     "Fish are sensitive, they have personalities',says the marine biologist. For Earle, eating afish would

be like eating a dog or a cat. "I would never eat anyone I know personally."

     There's a lot more to fish than meets the eye: they talk to each other, they like to betouched, and

they engage in behavior that can seem very human. They can remember thingsand learn from experience.

Earle and a growing number of animal rights activists see these asstrong arguments against eating fish

altogether.

     The activists also point out that fish feel pain and fish suffer horribly on their way from the sea to

the supermarket. "While it may seem obvious that fish are able to feel pain, likeevery other animal,

some people think of fish as swimming vegetables," says Dr. Lynne Sneddon. "Really,it's kind of a

moral question. Is the enjoyment you get from fishing (oreating fish) more important than the pain of

the fish?"

      Fishermen and (fried) fish lovers are doubtful. "I've never seen a smart fish," says Marie Swaringen

as she finishes off a plate of fish at a Seattle seafood restaurant. "If they were verysmart, they wouldn't

get caught. "

     "For years, everyone's been telling us to eat fish because it's so good for us," says another diner.

''Now I've got to feel guilty while I'm eating my fish? What are they going to think of next? Don't eat

salad because cucumbers have feelings?"

1. Dr. Sylvia Earle discourage people from eating fish because.

A. there are not that many wild fish in the ocean

B. fish actually are sensitive and have personalities

C. some ocean fish contain poisonous substances

D. fish are like dogs or cats that people know personally

2. We can infer from the passage that      .

A. all people don't agree with the idea to stop eating fish

B. people will be persuaded not to eat fish in the future

C. stopping eating fish will lead to people's not eating vegetables

D. we shouldn't care too much about the feeling of fish

3. By saying "There's a lot more to fish than meets the eye, " the writer means.

A. there are far more fish than other animals in the world

B. there are more fish in the world than people can see

C. people can see more fish if they pay more attention

D. fish are not that simple as they appear to people's eyes

4. What is the writer's attitude towards people eating fish?

A. Neutral.

B. Indifferent.

C. Approving.

D. Opposed.