全部题库 / 英语六级 / 试题详情

单选题英语六级

2017-06-06

What will happen if whale numbers drop to a certain degree?

A． The number will bounce back at a certain point.

B． Whales begin to adapt to new living conditions.

C． The extinction of whales becomes unavoidable.

D． A biological disaster will come to the earth.

查看答案及解析进入在线模考

参考答案

C

答案解析

定位：根据题干中的信息词drop和a certain degree定位到最后一段第一句。
解析：该句意为：“当种群被降到临界水平之下时……种群数量自然就会发生螺旋式下降，而且这或许是不可阻挡的。”由此可判断，这种无法停止的下降趋势会导致鲸鱼种群的消亡。故正确答案为C。

你可能感兴趣的试题

1 If whales scatter in the vast sea,

A． they will be destined to find the opposite sex

B． their gene pool will be on the edge of destruction

C． their chances of reproducing will be reduced

D． they cannot be the ideal ones to follow

查看解析在线模考

2 相比于一些发达国家，中国高速铁路起步较晚，但十年问中国已经成为世界上高速铁路发展最快的国家。无论是基础建设、运营里程，还是技术经验和经营管理，中国高铁均在稳步、快速的发展进程中逐步向世界证明自身的能力。近年来，无论是外交访问(diplomatic visit.还是国外领导访华，我国领导人都会向外推介中国高铁，让中国高铁成为代表中国产品的名片，让世界见证中国的实力。中国高铁的向外输出在一定程度上标志着中国从技术引进走向自主创新(independent innovation）在发展上实现了重大飞跃。

查看解析在线模考

3 Directions: For this part, you are allowed 30 minutes to write an essay on inspiration and action by referring to the remark "We should be taught not to wait for inspiration to start a thing. Action always generates inspiration." You can cite examples to illustrate your point and then explain what you will do to develop your inspiration and how you can make use of your inspiration. You are required to write at least 150 words but no more than 200 words.

查看解析在线模考