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问题 选择题

习惯上划分东西半球的分界线是

A．0°经线和180°度经线

B．20°E和160°W

C．0°经线和 0°纬线

D．20°W 和160°E

答案

答案：D

题目分析：东西半球的分界线为20°W和160°E构成的经线圈。所以本题选择D。而0°经线并不是东西半球的分界线所以A、C选项错误。

点评：东西半球的分界线容易错误的记忆成0°和180°经线。东西半球的划分一定要区别于南北半球的划分，地球上有最长的纬线，而无最长的经线，所以东西半球的划分选择了两条尽量少穿过陆地的经线构成的经线圈20°W和160°E。

单项选择题 A1/A2型题

促肾上腺皮质激素瘤常引起何种临床表现（）。

A.巨人症

B.Nelson综合征

C.闭经-溢乳综合征

D.甲状腺功能亢进症

E.Cushing综合征
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单项选择题

It is quite reasonable to blame traffic jams, the cost of" gas and the great speed of modern life, but manners on the toad are becoming horrible. Eye,body knows that the nicest men would become fierce tigers behind the wheel. It is all right to have a tiger in a cage, but to have one in the driver’s seat is another matter.
Road politeness is not only good manners, but good sense too. It takes the most cool-headed drivers great patience to give up the desire to beat back when forced to face rude driving. On the other hand, a little politeness goes a long way towards reducing the possibility of quarrelling and fighting. A friendly nod or a wave of thanks in answer to an act of politeness helps to create an atmosphere of good will and calmness so necessary in modern traffic conditions. But such behaviors of politeness are by no means enough. Many drivers nowadays don’t even seem able to recognize politeness when they see it.
However, misplaced politeness can also be dangerous. Typical examples are the driver who waves a child crossing the street at a wrong place into the path of oncoming cars that may be not able to stop in time. The same goes for encouraging old ladies to cross the road wherever and whenever they want to.
An experienced driver, whose manners are faultless, told me it would help if drivers learnt to correctly join in traffic stream without causing total blockages that give rise to unpleasant feelings. Unfortunately, modern drivers can’t even learn to drive,let alone master the roadmanship. Years ago, experts warned us that the fast increase of the car ownership would demand more give-and-take from all road users. It is high time for all of us to take this message to heart.

It is not always right for drivers to______.

A. master roadmanship
B. recognize politeness when they see it
C. encourage old ladies to cross the road whenever and wherever they want
D. give a friendly nod in answer to an act of politeness
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