问题 选择题

下列各项中不属于动物行为的是

A.蜻蜓点水

B.青蛙冬眠

C.兔的心脏在跳动

D.孔雀开屏

答案

答案:C

题目分析:动物行为是生物进行的从外部可察觉到的有适应意义的活动.动物所进行的一系列有利于他们存活和繁殖后代的活动,都是动物行为.不仅包括身体的运动,还包括静止的姿势、体色的改变或身体标志的显示、发声,以及气味的释放等.因此动物冬眠、睡觉属于动物行为.先天性行为是动物生来就有的,由动物体内的遗传物质所决定的行为;学习行为是在遗传因素的基础上,通过环境因素的作用,由生活经验和学习而获得的行为.生殖行为:与动物繁殖有关的行为.如占巢、求偶、交配、孵卵、哺育等一系列行为.“孔雀开屏”雄孔雀开屏是为了吸引雌孔雀,是求偶行为,“蜻蜓点水”是蜻蜓在产卵;属于生殖行为,是生来就用的行为,属于先天性行为.故选C

单项选择题

As Oil Declines, So does America


More than 100 years ago, America’s first great economic (26) abroad was spearheaded by its giant oil companies, notably John D. Rockefeller’s Standard Oil Company. These companies (27) powerful beachheads in Mexico and Venezuela, and later in parts of Asia, North Africa and, of course, the Middle East. (28) they became ever more dependent on the extraction of oil in distant lands, American foreign policy began to be (29) around acquiring and protecting US oil concessions in major (30) areas.
With World War Ⅱ and the Cold War, oil and US national (31) became thoroughly intertwined. After all, the United States had prevailed over the Axis (32) in significant part because it possessed vast reserves of domestic petroleum, while Germany and Japan lacked them, depriving their forces of vital (33) supplies in the final years of the war. As it happened, though, the United States was using up its domestic (34) so rapidly that, even before World War Ⅱ was over, Washington (35) its attention to finding new overseas sources of crude oil that could be (36) under American control. As a result, Saudi Arabia, Kuwait and a host of other Middle Eastern producers would become key US oil suppliers (37) American military protection.
There can be (38) question that, for a time, American domination of world oil production would prove a potent source of economic and military power. (39) World War Ⅱ, an abundance of cheap US oil spurred the (40) of vast new industries, including civilian air travel, highway construction, a (41) of suburban housing and commerce, mechanized agriculture, and plastics.

A. When B. Since C. As D. Because

Abundant oil also underlay the global expansion of the country’s (42) power, as the Pentagon defended the world while becoming one of the planet’s great oil guzzlers. Its global dominion came to (43) on an ever-expanding array of oil-powered ships, planes, tanks and missiles. As long as the Middle East—and especially Saudi Arabia—served essentially as an American gas station and oil (44) a cheap commodity, all this was relatively painless. That is why the use of military force has been a (45) of American foreign policy since 1987.

单项选择题