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问题 选择题

刘伟，10岁时因触电意外失去双臂，但是刘伟不向命运低头，12岁学习游泳， 14岁获得全国游泳亚军； 后来因为身体原因不能再游泳，他重新给自己定个目标——学钢琴。因为没有双手而找不到钢琴老师，他就自学钢琴，仅用一年即可弹奏出相当于手弹钢琴7级水平的钢琴曲《梦中的婚礼》。刘伟的事迹启示我们（     ）

①要养成自立自强的生活态度   ②坚强意志是实现人生目标的保障

③刘伟是特殊人物，常人可望不可即  ④要勇敢面对挫折的挑战，寻找有效的应对方法

A．②③④

B．①②④

C．①②③

D．①③④

答案

答案：B

题目分析：刘伟，10岁时被截去双臂，但是他没有向命运低头，通过自身的努力，自强不息，靠着坚强的意志，克服了挫折，最后获得了成功。因而①②④都是符合题意的，B是正确答案。③说法是错误的，刘伟也是常人，只是他比常人付出了更多，从而取得了傲人的成绩。

点评：本题从多个角度整合了有关自立自强的相关知识点，旨在帮助学生全面理解自立自强的内涵，尤其是正确理解自立自强与接受他人帮助之间的关系。学生在审题中要注意把握题目要求，否则可能会因粗心而导致选错。

单项选择题

The ocean bottom—a region nearly 2.5 times greater than the total land area of the Earth —is a vast frontier that even today is largely unexplored and uncharted. Until about a century ago, the deep-ocean floor was completely inaccessible, hidden beneath waters averaging over 3,600 meters deep. Totally without light and subjected to intense pressures hundreds of times greater than at the Earth’s surface, the deep-ocean bottom is a hostile environment to humans, in some ways as forbidding and remote as the void of outer space.
Although researchers have taken samples of deep-ocean rocks and sediments for over a century, the first detailed global investigation of the ocean bottom did not actually start until 1968, with the beginning of the National Science Foundation’s Deep Sea Drilling Project (DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP’s drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean’s surface and drill in very deep waters, extracting samples of sediments and rock from the ocean floor.
The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983. During this time, the vessel logged 600,000 kilometers and took almost 20,000 core samples of seabed sediments and rocks at 624 drilling sites around the world. The Glomar Challenger’s core samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to calculate what it will probably look like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger’s voyages, nearly all earth scientists agree on the theories of plate tectonics and continental drift that explain many of the geological processes that shape the Earth.
The cores of sediment drilled by the Glomar Challenger have also yielded information critical to understanding the world’s past climates. Deep-ocean sediments provide a climatic record stretching back hundreds of millions of years, because they are largely isolated from the mechanical erosion and the intense chemical and biological activity that rapidly destroy much land-based evidence of past climates. This record has already provided insights into the patterns and causes of past climatic change—information that may be used to predict future climates.

Deep-ocean sediments provide better information about the world’s past climate because they______.

A．are well protected

B．have land-based evidence

C．are in isolation

D．have a longer history
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单项选择题

急性硬膜外血肿的出血来源包括以下各项，除了

A．脑膜中动脉及其分支损伤

B．矢状窦或横窦损伤

C．筛前动脉损伤

D．桥静脉损伤

E．脑膜前动脉损伤
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