设函数f(x)=(x-1)(x+2)(x-3)(x+4)·…·(x+100)，则f’

The first crocodiles(鳄鱼) lived on the Earth about 240 million years ago. How much do you know about these dangerous animals? Here are some amazing facts about them.

◆ The biggest crocodile is the saltwater crocodile. It can be as long as seven metres!

◆ If you take a bright light at night over a river with crocodiles inside, you will see pairs of red spots (点). Those are the crocodiles’ eyes. They can see well at night.

◆ When you see a crocodile with its mouth open, don’t be scared. That just tells you it’s too hot.

◆ On the beach, crocodiles get tired very quickly, but they can stay in the water for 2-3 hours.

◆ Most crocodiles can live up to 70 years old!

小题1: When did the first crocodiles live?

A．About 2,400,000,000 years ago.

B．About 240,000,000 years ago.

C．About 24,000,000 years ago.

D．About 2,400,000 years ago.小题2:The writer thinks the crocodile is 　　     .

A．lovely

B．dangerous

C．fun

D．cool小题3: What’s the meaning of the underlined word “scared”?

A．Happy.

B．Sad.

C．Comfortable.

D．Afraid.小题4: Which of the following is right?

A．Crocodiles often open their mouths when it’s hot.

B．Crocodiles can stay on the beach for 2-3 hours.

C．All the crocodiles can live up to 70 years old.

D．The writer talks about four facts about crocodiles.

David said that it was ____________ his strong interest in computers that he chose the course.

A．next to

B．far from

C．in all

D．due to

发达国家限制进口的技术性贸易壁垒措施主要包括（）。

A.技术标准

B.商品包装和标签的规定

C.支付协定

D.卫生检疫规定

E.海关估价

地西泮不具有的药理作用是

A．镇静催眠

B．抗惊厥

C．中枢性肌肉松弛

D．抗精神分裂

E．抗焦虑

费率厘定中的（），要求保险人在保险费率的厘定过程中，应确保所收保费能够足以抵补一切可能发生的损失及有关营业费用。

A.弹性原则

B.合理性原则

C.适度性原则

D.公平性原则