创业是一个艰苦的过程，是一个渐进的过程，切忌（）情绪。A.急躁 B.消极 C.浮躁

一个三角形中最大的内角一定（　　）

A．大于90度

B．大于60度

C．不小于60度

D．等于60度

一般建设工程项目，由( )进行施工过程及竣工后保修期内的沉降观测工作。

A．施工单位
B．监理单位
C．业主
D．承包单位

在实现物流合理化的途径中，服务标准化是()中物流合理化的途径之一。

A．生产制造活动 

B．信息处理 

C．销售活动 

D．质量保证

质量为m的小球被斜绳A和水平绳B系在车厢内，如图所示，

当车厢向右做匀速直线运动时，两根绳对小球的拉力分别为

T₁和T₂，当车厢突然加速运动时，两根绳的拉力变化情况是

A．T₁不变，T₂变大

B．T₁变大，T₂变大

C．T₁不变，T₂变小

D．T₁变小，T₂变小

As dangerous as sharks may have seed to people after watching Jaws, which was released on June 20,1975, the recent disastrous decrease in their numbers show that people have proven far more dangerous to sharks.

This disastrous decline is due in large part to commercial fishing of sharks. “The market for

shark fins（鱼翅）in East Asia opened up thanks to changes in their economy, increasing their

ability to spend money on things such as shark fin soup,” Burgess said.

However, the biggest worry for sharks and their relatives, the skates and rays, which are suffering a similar fate, “is how they are killed incidentally when fishermen try and take other fish—the problem of bycatch（渔业混获）,” Burgess explained. “They may be thrown back afterward, but they’re still dead.”

The key of the problems behind bringing sharks back is that “they’re not the same as other fish,” Burgess said, “Sharks are slow growing and slow to reach maturity. Sharks are live bearers, which means females keep their young in their body just like us, but instead of nine months, it takes 12 to 18 months or more in sharks. Also, sharks generally can’t give birth again until a year after they’ve given birth—sometimes they’re on a three-year cycle. So once you get a shark population knocked down, this ‘life in the slow lane’ means that recovery is measured in decades rather than years.”\

Burgess said, “I’m on the recovery team for it, but the recovery plan for that is over the course of 100 years. So I won’t see them recover, nor will you, nor will your children. That’s what it means when these animals go down—they’re down a long time.”

Any measures aimed at saving sharks must not only consider byeatch, “which is the real killer right now,” but also encourage interactional cooperation, Burgess said.

“Sharks are very migratory, and many species cross borders,” he said. “We can protect them only by getting many govemment to come aboard. That’s the hardest part about this.”

小题1:The text mainly tells us      .

A．shark fins are valuable

B．sharks are dangerous

C．bycatch brings bad effects

D．sharks are in danger小题2:The number of sharks is decreasing mostly because of     .

A．the film Jaws

B．commercial interests

C．changes in economy

D．shark fin soup小题3:Bringing sharks back is difficult because     .

A．they’re like the other fish

B．their reproductive rate is slow

C．they can’t give birth again

D．their life cycle is only 3 years小题4:What can be concluded from the last paragraph?

A．Sharks live the way human beings do.

B．It’s time many govemments cooperate.

C．Sharks’ migration takes a very long time.

D．Bycatch shouldn’t be forbidden by intemational laws.小题5:The test is most probably a        .

A．newspaper ad

B．book review

C．science news report

D．science fiction story