问题 单项选择题

有一种能产生毒素的微生物会使海水变成红色,这种现象被称为赤潮。当海獭的主要食物来源蛤蜊被赤潮毒素污染时,海獭就不会在那些区域觅食。对于海獭的这种行为,一种解释认为,海獭在某个地方正式觅食之前会先尝几个蛤蜊,并且能够察觉出其中的任何毒素。以下哪项为真,将最有力地表明上述解释是不正确的

A.在赤潮出现的某些海域,既没有蛤蜊也没有海獭。

B.少量的赤潮毒素不会产生什么危害,但是大量的这种毒素会使海獭死亡。

C.当没有受到赤潮影响的一片海水被人为地染成棕红色时,海獭也不吃那些地方的蛤蜊。

D.海獭在某个海域出现是一种显著的标志,表明那里可以找到其他海洋生物。

答案

参考答案:C

解析:题干的论证认为,海獭在某个地方正式觅食之前会先尝几个蛤蜊,并且能够察觉出其中的任何毒素。如果C选项成立,那么当没有受到赤潮影响的一片海水被人为地染成棕红色时,海獭也不吃那些地方的蛤蜊。这说明海獭是依靠看海水是否变成红色而确定它的主要食物是否被赤潮毒素污染的,而不是靠先尝几个蛤蜊来确定它的主要食物是否被赤潮毒素污染。所以题干中所给的解释是不正确的。答案为CA选项是无关选项;B选项也不正确,题干的解释认为:海獭能够察觉出其中的任何毒素,所以毒素的多少并不会影响海獭的察觉;D选项也是无关选项。

阅读理解

THIS was the year the Earth struck back.

Earthquakes, heat waves, floods, volcanoes, super typhoons, snow storms, landslides and droughts killed at least a quarter of a million people in 2010 – the deadliest year in more than a generation. More people were killed worldwide by natural disasters this year than have been killed in terrorism attacks in the past 40 years combined.

"It just seemed like it was back-to-back and it came in waves," said Craig Fugate, who heads the U.S. Federal Emergency Management Agency. It handled a record number of disasters in 2010.

And we have ourselves to blame most of the time, scientists and disaster experts say.

Even though many catastrophes have the ring of random chance, the hand of man made this a particularly deadly, costly, extreme and weird(古怪的) year for everything from wild weather to earthquakes.

Poor construction and development practices conspire to make earthquakes more deadly than they need be. More people live in poverty in vulnerable(脆弱的) buildings in crowded cities. That means that when the ground shakes, the river breaches, or the tropical cyclone hits, more people die.

Disasters from the Earth, such as earthquakes and volcanoes "are pretty much constant," said Andreas Schraft, vice president of catastrophic perils for the Geneva-based insurance giant Swiss Re. "All the change that's made is man-made."

The January earthquake that killed well more than 220,000 people in Haiti is a perfect example. Port-au-Prince has nearly three times as many people - many of them living in poverty - and more poorly built shanties than it did 25 years ago. So had the same quake hit in 1985 instead of 2010, total deaths would have probably been in the 80,000 range, said Richard Olson, director of disaster risk reduction at Florida International University.

In February, an earthquake that was more than 500 times stronger than the one that struck Haiti hit an area of Chile that was less populated, better constructed, and not as poor. Chile's bigger quake caused fewer than 1,000 deaths.

Climate scientists say Earth's climate also is changing, bringing extreme weather, such as heat waves and flooding.

In the summer, one weather system caused oppressive heat in Russia, while farther south it caused flooding in Pakistan that inundated 161,200 square kilometers, about the size of Wisconsin. That single heat-and-storm system killed almost 17,000 people, more people than all the worldwide airplane crashes in the past 15 years.

Scientists have calculated that the killer Russian heat wave—setting a national record of 43.9℃—would happen once every 100,000 years without global warming.

小题1:What is responsible for the most human deaths in 2010?

A.Natrual disasters.

B.Terrorist attacks.

C.Poor buildings.

D.Too rapid developrnent.小题2:According to Andreas Schraft,             .

A.earthquakes are happening more often because of human beings

B.earthquakes are causing more damage because of human beings

C.stronger houses should be built to limit storm damage

D.Port—au—Prince is now overpopulated小题3:The main point of the article is to           

A.list the natural disasters that occurred in 2010

B.give the details of some natural disasters of 2010

C.warn that more natural disasters are to strike

D.blame humanity for not helping those affected by the disasters

填空题