有机氟急性中毒的特效解毒剂（） A．乙酰胺注射液  B．纳洛酮  C．维生素Kl

团购，就是团体购物，指认识或不认识的消费者联合起来，加大与商家的谈判能力，以求得最优价格的一种购物方式。有关数据显示，2012年全国网络团购的总成交额达213.9亿元，同比2011年增长93%，全年总购买人次达到4.56亿，较2011年增长45%。材料表明

A．生产决定消费的方式和水平

B．受求实心理主导，网络团购是值得推崇的理智消费

C．团购主要受从众心理影响，具有盲目性，因而是不可取的

D．价格不仅影响消费水平，也会影响消费方式

Few laws are so effective that you can see results just days after they take effect.But in the nine days since the federal cigarette tax more than doubled－to $1.01 per pack－smokers have jammed telephone “quit lines” across the country seeking to kick the habit.

This is not a surprise to public health advocates.They've studied the effect of state tax increases for years，finding that smokers，especially teens，are price sensitive.Nor is it a shock to the industry，which fiercely fights every tax increase.

The only wonder is that so many states insist on closing their ears to the message.Tobacco taxes improve public health，they raise money and most particularly，they deter people from taking up the habit as teens，which is when nearly all smokers are addicted.Yet the rate of taxation varies widely.

In Manhattan，for instance，which has the highest tax in the nation，a pack of Marlboro Light Kings，cost $10.06 at one drugstore Wednesday.In Charleston，S.C.，where the 7 cent a pack tax is the lowest in the nation，the price was $4.78.

The influence is obvious.

In New York，high school smoking hit a new low in the latest surveys－13.8%，far below the national average.By comparison,26% of high school students smoke in Kentucky.Other low tax states have similarly depressing teen smoking records.

Hal Rogers，Representative from Kentucky，like those who are against high tobacco taxes，argues that the burden of the tax falls on lowincome Americans “who choose to smoke.”

That's true.But there is more reason in keeping future generations of lowincome workers from getting hooked in the first place.As for today's adults，if the new tax drives them to quit，they will have more to spend on their families，cut their risk of cancer and heart disease and feel better.

小题1:The text is mainly about ________.

A．the price of cigarettes

B．the rate of teen smoking

C．the effect of tobacco tax increase

D．the differences in tobacco tax rate小题2:What can we learn from the last paragraph?

A．The new tax will be beneficial in the long run.

B．Lowincome Americans are more likely to fall ill.

C．Future generations will be hooked on smoking.

D．Adults will depend more on their families.小题3:Rogers' attitude towards the lowincome smokers might be that of ________.

A．tolerance

B．unconcern

C．doubt

D．sympathy小题4:What does the author think is a surprise?

A．Teen smokers are price sensitive.

B．Some states still keep the tobacco tax low.

C．Tobacco taxes improve public health.

D．Tobacco industry fiercely fights the tax rise.

正置式主轴承采用撑杆固紧轴承盖时，一般拆卸是将螺母上旋，安装时将螺母下旋。

针对急性呼吸衰竭患者，可应用于增加呼吸频率和潮气量，改善肺泡通气的药物是（）

A.尼可刹米

B.洛贝林

C.纳洛酮

D.多沙普仑

E.阿米三嗪

哥伦布第四次航行的时间是（）。

A.1492年

B.1493年—1496年

C.1498年—1500年

D.1502年—1504年