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问题 选择题
某硫酸铝溶液中，含 Al3+ a g，则溶液中 SO42-的物质的量为（　　）
答案

答案：B

单项选择题

对于分诊及相应处理正确的是（）

A.不像SARS者，进入正常诊断程序

B.疑似SARS者，安排医学隔离观察，可采用居家隔离观察并随诊的形式

C.临床诊断SARS者，收至SARS定点医院，可置于多人病房

D.确定SARS诊断者，收至SARS定点医院，为避免交叉感染，需置单人病房

E.以上均不正确
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单项选择题

Passage One


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.

The passage mainly talks about______.

A．road politeness

B．traffic jams

C．good manners

D．modern drivers
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