解方程：3（a+5）2﹣2（3﹣a）2+（9﹣a）（9+a）=0．

引起副溶血性弧菌食物中毒的食品主要是（）

A.肉、禽、蛋、奶等动物性食品

B.海产品及盐渍食品

C.玉米、花生仁

D.蔬菜

E.肉、禽、蛋、奶等动物性食品和鱼、虾、蟹、贝等海产品

社会主义精神文明在社会主义现代化建设中具有的重要战略地位和作用，表现在( )。

A．为经济建设提供精神动力

B．为现代化建设提供智力支持

C．为现代化建设创造良好的社会环境

D．为现代化建设和正确发展方向提供思想保证

Should e-cigarettes (electronic cigarettes) be a new choice for the smokers trying to get rid of the habit? Reactions from Americans are mixed. More than half of the people questioned in a survey think e-cigarettes should be controlled by the US Food and Drug Administration, but 47 percent believe the e-cigarettes should be available to the smokers who want to quit.

“In the hunt for a safter cigarette, e-cigarettes are becoming a popular choice among those either trying to quit.”or looking to replace standard tobacco smoke with an alternative that manufacturers claim to be safer, ”Zogby International, which conducted the survey, said in a statement.

About half of the 4,611 adults who took part in the survey had heard about e-cigarettes, which are battery-powered, or rechargeable cigarettes that vaporize a liquid nicotine solution. They do not produce smoke but a water vapor without smell. Sold mostly on the Internet, e-cigarettes were first made in China.

Last year the World Health Organization (WHO) warned against using e-cigarettes, saying there was no evidence to prove they were safe or helped smokers break the habit. The WHO said people who smoke e-cigarettes breathe in a fine fog of nicotine into the lungs.

Nearly a third of people questioned in the survey think that e-cigarettes should be allowed in places where smoking is forbidden, because they don’t produce smoke, but 46 percent disagree. Men who were aware of the availability of e-cigarettes were more likely than woman to say they should be a choice available to smokers who want to quit. Young people, aged 18-29, and singles were the groups most open to trying e-cigarettes. Smoking is the single largest cause of preventable death worldwide, according to the WHO.

小题1:What can we learn from Paragraph 1?

A．American smokers ought to try e-cigarettes.

B．Americans have different opinions about e-cigarettes.

C．Every kind of cigarettes should be forbidden in America.

D．Most of the Americans don’t like e-cigarettes.小题2:According to Zogby International, e-cigarettes        .

A．are much safer than common cigarettes

B．are popular among people who want to quit smoking

C．will take the place of traditional cigarettes

D．are produced in a safer way by manufacturers小题3:What do we know about e-cigarettes from the passage?

A．Most Americans are familiar with them.

B．They are a good choice as there is no nicotine.

C．They produce a water vapor that can’t be seen.

D．Most people buy them on the Internet.小题4:What’s the attitude of the WHO towards e-cigarettes?

A．Negative

B．Supportive

C．Doubtful.

D．Indifferent

在欧债危机日益恶化的形势下，欧洲以及其他地区和国家的央行可能会大量印刷钞票应对，由此会形成热钱新一轮的泛滥，届时将持续提高诸如房地产等不动产的价格，因此投资者现在应该继续买进房产。
以下无法削弱上述结论的一项是( )。

A．为了本国经济的健康发展，许多国家将不会增发货币
B．当前的房地产价格平稳，短期内不会有大的波动
C．由于房地产市场泡沫严重，国家出台了一系列打击房地产投机的政策
D．由于大量外来人口涌入城市，人们对于住房的刚性需求依然存在

OOMYCOTA卵菌门的结构特征。