密闭有空气的薄塑料瓶因降温而变扁，此过程中瓶内空气（不计分子势能）
A．内能增大，放出热量B.内能减小，吸收热量
C．内能增大，对外界做功D.内能减小，外界对其做功
有疑问？点此联系我们
收藏该题
查看答案
密闭有空气的薄塑料瓶因降温而变扁，此过程中瓶内空气（不计分子势能）
A．内能增大，放出热量B.内能减小，吸收热量
C．内能增大，对外界做功D.内能减小，外界对其做功
A. needs B. activities C. judgments D. habits Ks5u
某校开展了以“纪念新中国成立60周年”为主题的读书活动。开展这项活动，有利于激发学生的爱国热情，增强其历史使命感和责任感，有利于引导学生把握人生道理、实践人生追求。这是因为.
①文化能促进社会的全面发展.
②文化对人具有潜移默化的影响.
③有文化知识才会有崇高的道德.
④文化作为精神力量能转化为物质力量.
A.①②B.②④C.①③D.③④.
B
Foreign drivers will have a pay on-the-spot fines of up to ￡900 for breaking the traffic law to be carried our next month.
If they do not have enough cash or a working credit card, their vehicles will clamped（扣留）until they pay and they will face an additional fee of &80 for getting back their vehicles .
The law will also apply to British citizens ,The fines will be dcgcribed officially as “deposits” when the traffic law take effect ,takes effect ,because the money would be returned if the driver went to court and was found not guilty ,In practice, very few foreign drives are likely to return to Britain to deal with their eases.
Foreign drivers are rarely charged because police cannot take action against them if they fail to appear in court, Instead, officers often merely give warnings.
Three million foreign-registered vehicles enter Britain each year . Polish vehicles s make up 36 percent, French vehicles 10 percent and German vehicles 9 percent.
Foreign vehicles are 30 percent more likely tope in a crash than British-registered vehicles .The number of crashes caused by foreign vehicles rose by 47 percent between 2003 and 2008 .there were almost 400 deaths and serious injuries and 3,000 slight injuries from accidents caused by foreign vehicles in 2008.
The new law is partly intended to settle the problem of foreign lorry drivers ignoring limits on weight and hours at the wheel .Foreign lorries are throe times more likely to be in a crash than British Lorries. Recent spot checks found that three quarters of Lorries that failed safety teats were registered overseas.
The standard deposit for a careless driving offence —such as driving too close to the vehicle in front or reading a map at the wheel—will be ￡300. Deposits for speeding offences and using mobile phones will be ￡60. Foreign drivers will not get points as punishment added to their licenses, while British drivers will.
60. The first paragraph serves as a（n）
A. explanation B. introduction C. comment D. background.
俄国作家列夫?托尔斯泰的小说《安娜?卡列尼娜》，生动地描述了俄国贵族的生活。它所属的文学流派是
A．古典主义B．现实主义C．浪漫主义D．现代主义
What is the writer’s attitude toward Wilkins, Watson and Crick?
A. Disapproving
B. Respectful.
C. Admiring
D. Doubtful