水龙兽在地球上的分布不包括下列哪个地区()。A、南美B、南非C、印度D、北极

题型:单项选择题

问题:

水龙兽在地球上的分布不包括下列哪个地区()。

A、南美

B、南非

C、印度

D、北极

考点:地球科学构造地质学构造地质学题库
题型:单项选择题

Modern liberal opinion is sensitive to problems of restriction of freedom and abuse of power. (1) , many hold that a man can be injured only by violating his will, but this view is much too (2) . It fails to (3) the great dangers we shall face in the (4) of biomedical technology that stems from an excess of freedom, from the unrestrained (5) of will. In my view, our greatest problems will be voluntary self-degradation, or willing dehumanization, as is the unintended yet often inescapable consequence of sternly and successfully pursuing our humanization (6) .

Certain (7) and perfected medical technologies have already had some dehumanizing consequences. Improved methods of resuscitation have made (8) heroic effort to "save" the severely ill and injured. Yet these efforts are sometimes only partly successful: They may succeed in (9) individuals, but these individuals may have sever brain damage and be capable of only a less-than-human, vegetating (10) . Such patients have been (11) a death with dignity. Families are forced to bear the burden of a (12) "death watch".

(13) the ordinary methods of treating disease and prolonging life have changed the (14) in which men die. Fewer and fewer people die in the familiar surroundings of home or in the (15) of family and friends. This loneliness, (16) , is not confined to the dying patient in the hospital bed. As a group, the elderly are the most alienated members of our society: Not yet (17) the world of the dead, not deemed fit for the world of the living, they are shunted (18) . We have learned how to increase their years, (19) we have not learned how to help them enjoy their days. Yet we continue to bravely and feverishly push back the frontiers (20) death.

18()

A.away

B.aside

C.off

D.down

题型:单项选择题

举折

题型:单项选择题

下图1是实验室模拟炼铁的装置图,试回答:

(1)仪器①的名称是______;仪器②的名称是______.

(2)实验过程仪器①中发生反应的化学方程式是______,仪器③中的现象是______.

(3)实验过程中产生的尾气不能直接排放的原因是______.

(4)图2是工业生产中炼铁高炉的结构图.实际生产中炼铁的原料铁矿石、焦炭、石灰石是从原料入口加入,其中焦炭在高炉炼铁时的作用之一是产生高温,另一作用为______;生铁出口低于炉渣出口的原因是______.

(5)取少量高炉中炼出的生铁放入烧杯中,加入足量稀盐酸,可观察到的现象是______,发生反应的化学方程式为______,当反应停止后,还可观察到烧杯底部有黑色不溶物,该物质主要是(填化学式)______.

题型:单项选择题

企业经营者能够把市场盲点变成亮点,这表明______.

A.事物之间存在着先行后续的因果关系

B.事物都有一个变化发展的过程

C.人的主观能动性是巨大的

D.规律是事物运动过程中的必然联系

题型:单项选择题

()与钻石折射率相似或高于钻石,故不显透视效应。

A.无色托帕石与无色水晶

B.钛酸锶与碳硅石

C.无色水晶与无色蓝宝石

D.无色锆石与无色蓝宝石

更多题库