问题 选择题

该图为某一河流及河床AB处的剖面示意图。某地理兴趣小组成员9月23日正午(地方时)在A处观测到的太阳仰角为55.5°,且太阳光线与河岸接近垂直,据此回答问题。

小题1:该地的地理纬度可能是

A.55.5°S

B.55.5°N

C.34.5°S

D.34.5°N小题2:下列关于该河的叙述,正确的是

A.该河段有凌汛现象

B.此时该河流处于汛期

C.该河流经亚寒带针叶林带

D.该河段水流自东向西流

答案

小题1:C

小题2:D

题目分析:

小题1:利用图示“9月23日正午(地方时)”、“A处观测到太阳仰角为55°30′,且太阳光线与河岸接近垂直”等信息,抓住右边剖面图“B岸陡,A岸缓”这个显性信息,搜索教材中“地转偏向力”这个知识点,推断水流往B岸偏向,从而得出该地点在南半球,B、D错误;再根据题目中“9月23日正午,A处太阳仰角为55°30′”,应用正午太阳高度=90°-纬度差,计算即可。

小题2:结合上题分析可知:该地正午时,太阳始终在其正北方向,那么A一定是北岸,B是南岸,该河从东向西流,故D项正确。该地区位于34.5°S,判断为亚热带地区,故河流无冰期,故无凌汛,A、C错误;此时为9月23日,为当地的秋季,结合不同类型的河流补给类型,亚热带地区的河流汛期或在夏季或在冬季,B错误。

点评:结合资料分析,考查同学的综合分析能力。较难题。解题的关键是从题干中提取有效信息,综合分析。

单项选择题
单项选择题

Here in the U. S. a project of moving the government a few hundred miles to the southwest proceeds apace, under the supervision of Senator Robert Byrd of West Virginia. Apart from the usual highways and parks, Byrd has taken a special interest in transplanting pieces of federal agencies from metropolitan Washington to his home state.

Strangely, Byrd’s little experiment in de-Washingtonization has become the focus of outrage among the very people who are otherwise most critical of Washington and its ways. To these critics, it is the very symbol of congressional arrogance of power, isolation from reality, contempt for the voters, and so on, and demonstrates the need for term limits if not lynching.

Consider the good-government advantages of (let’s call it) the Byrd Migration. What better way to symbolize an end to the old ways and commitment to reform than physically moving the government What better way to break up old bureaucracies than to uproot and transplant them, files and all

Second, spreading the government around a bit ought to reduce that self-feeding and self regarding Beltway culture that Washington-phobes claim to dislike so much. Of course there is a good deal of hypocrisy in this anti-Washington chatter. Much of it comes from politicians and journalists who have spent most of their adult lives in Washington and wouldn’t care to live anywhere else. They are not rushing to West Virginia themselves, except for the occasional quaint rustic weekend. But they can take comfort that public servants at the Bureau of the Public Debt, at least, have escaped the perils of inside-the-Beltway insularity.

Third, is Senator Byrd’s raw spread-the-wealth philosophy’ completely illegitimate The Federal Government and government-related private enterprises have made metropolitan Washington one of the richest areas of the country. By contrast, West Virginia is the second poorest state, after Mississippi. The entire country’s taxes support the government. Why shouldn’t more of the country get a piece of it As private businesses are discovering, the electronic revolution is making it less and less necessary for work to be centralized at headquarters. There’s no reason the government shouldn’t take more advantage of this trend as well.

It is hardly enough, though, to expel a few thousand midlevel bureaucrats from the alleged Eden inside the Washington Beltway. Really purging the Washington Culture enough to satisfy its noisiest critics will require a mass exodus on the order of what the Khmer Rouge instituted when they took over Phnom Penh in 1975. Until the very members of the TIME Washington bureau itself are traipsing south along 1-95, their word processors strapped to their backs, the nation cannot rest easy. But America’s would-be Khmer Rouge should give Senator Byrd more credit for showing the way.

Which of the following cannot describe the public’s opinions the government()

A. "Egotistic."

B. "Centralized."

C. "Illegitimate."

D. "Bureaucratic."