The text is mainly about______.

A . the scientific leadership of the U．S． B . the shortage of scientists in the U．S． C . the rapid globalization of science D . better communication and globalization

A.life in New York B.country life in New England C.sea adventures D.life on the Mississippi

A. the agriculture revolution B. the invention of labor-saving machinery C. the development of scientific agriculture D. the farming machinery in America

A．what physical features the giraffe has B．how the giraffe's heart works C．how the giraffes heart pumps blood to its head D．how the giraffes can stand up to high blood pressure

A．a famous Italian physician B．a famous Italian inventor C．a famous Italian electrician D．a famous Italian novelist

A．why animals can learn B．why man is different from animals C．why animals cannot speak D．why man has a big brain

A．the health benefits of afternoon naps B．the negative effects of sleep deprivation on health and worker productivity C．the importance of the siesta tradition in Spain and Latin America D．the siesta tradition and its health benefits

A．the present condition and the prospect of TV programs B．soaps' decline in viewers C．profits got by soaps through advertisements D．a brief introduction of soaps

A．indicate the author"s opinion on the issue B．present convincing arguments in favor of one side C．warn about the possible outcome of one course of action D．provide a previously unconsidered perspective on the situation

A.the results of an opinion poll B.what constitute the．best formula for happiness C.the importance of wealth to happiness D.why some people are happy and some are riot

A．fall guy B．take the rap C．bum rap D．take the blame

A．the fact that it is not the safest way to invest in the stock market B．buying and selling shares in the stock market C．the ways to invest in the stock market D．where one can buy or sell the shares

A．why we misunderstand what people say B．how to behave when we listen to others C．why we sometimes go wrong with our friends or enemies D．how to avoid mistakes when we communicate with people

A．introduce the two countries B．show the difference of the two countries C．tell a story of two very friendly countries

A．which metals conduct electricity best B．where to go in a thunderstorm C．how to treat someone struck by lightening D．how to make mouth-to-mouth resuscitation 此题为多项选择题。

A) how to make a wise buying decision B) ways to protect the interests of the consumer C) the positive and negative aspects of advertising D) the function of advertisements in promoting sales

A.why computer criminals are often able to escape punishment B.why computer crimes are difficult to detect by systematic inspections C.how computer criminals mange to get good recommendations from their former em-ployers D.why computer crimes can’t be eliminated

A．bilingual education in schools B．how to learn a new language C．the best time to learn a new language D．advantages of learning a new language

A．how to cross the street B．how to be safe in your everyday life C．how to use the public phones

A．what the demographic winter means B．why people highly value their kids C．why people are having fewer kids D．what matters most in people"s life