当今世界经济呈现全球化趋势的决定性因素是[ ] A．各国采取明智的外交政策 B．

在2008年北京奥运会开赛第一天，我国射击名将杜丽因应对压力的准备不足，结果与奖牌无缘。这说明[ ]

①杜丽虚伪，为自己的失败找借口。

②紧张的不良情绪会限制人的能力的发挥，影响运动员的成绩。

③选择射击是杜丽的错误。

④我们要善于调节自己的情绪，这样才有利于我们事业的成功。

A．①②④

B．②④

C．②③

D．③④

询价对象应当符合的条件有( )。

A．依法设立，最近24个月未因重大违法违规行为被相关监管部门给予行政处罚、采取监管措施或者受到刑事处罚

B．依法可以进行股票投资

C．信用记录良好，具有独立从事证券投资所必需的机构和人员

D．具有健全的内部风险评估和控制系统并能够有效执行，风险控制指标符合有关规定

阅读理解。

     Polar bears live in the coldest environments on Earth-the Arctic. Called "ice bears"  in many

European languages, polar bears depend on the ice that surrounds them for their survival. As the

Arctic climate changes and the ice slowly disappears, polar bears face an increasingly uncertain

future.

     Polar bears impress us with their incredible size, power and ability to survive in the cold Arctic.

These giants can stand three meters tall and weigh over 500kg, and they spend their lives traveling

throughout the Arctic. Two layers of fur keep them warm. Interestingly,the hairs are hollow in order

to direct the sunlight straight to the skin. Undemeath their fur, polar bears have an

additional l0-cm-layer of fat.

     Polar  bears  hunt  ringed seals (环斑海豹), which live under the Arctic ice. They wait patiently

for hours beside holes in the ice pack (浮冰群) for seals to surface and breathe. Using their great

strength , the bears pull the heavy animals up onto the ice. The seals provide much of the fat the

bears need for warmth.

     Since 2006 , polar bears  have been  labeled  a vulnerable  (脆弱的) species. Most experts feel

the threat to polar bears comes not from hunters or predators(食肉动物),but from the gradual melting

of Arctic ice. Due to global climate change, the Arctic region is getting warmer. Arctic ice is breaking

up earlier in the spring, and its area is decreasing.

     Problems polar bears around Canada's Hudson Bay are facing may indicate what lies ahead for

polar bears elsewhere. Hudson Bay is located at the southern limit of the polar bears' territory(领地) .

     Currently,the ice there breaks up three weeks earlier in the spring than it did 20 years ago. Polar

bears on Hudson Bay fast during the summer,waiting for ice to form in the fall to hunt. Every year,the

Summer gets longer, and the bears get skinner. Over the past 25 years, the average weight of the

female bears has dropped 68kg. This loss affects their ability to reproduce, and already the number

of births has dropped 15% . Unless the bears can leam to survive global climate change, the giants

of the ice may one day disappear.

1. What puts polar bears in a challenging situation in the future?   

A. More humans hunting in the Arctic.

B. The warming climate and melting ice.

C. The reducing number of food resources.

D. The changing weather and new habitats.

2. Paragraph 2 is mainly concemed with___________.   

A. the description of polar bears

B. polar bears' pattern of survival

C. brief information on polar bears

D. the types of polar bears

3. Which description of polar bears is TRUE?    

A. Polar bears are usually of medium size

B. Polar bears feed mainly on ringed seals.

C. In winter polar bears live under water.

D. Polar bears travel beyond the Arctic in summer.

4. The female bears have lost weight greatly in the past decades because___________.   

A. there are a few ringed seals to hunt

B. winter days are getting much longer

C. they have to give birth to more young

D. they have to wait longer before hunting

5. We can feel that the author's tone for polar bears is__________.

A. sympathetic                

B. optimistic

C. hopeful                        

D. indifferent

构成商品的本质属性是( )。

A．价值

B．价格

C．使用价值

D．交换价值