基因克隆是基因工程的核心.

America is a mobile society. Friendships between Americans can be close and real，yet disappear soon if situations change. Neither side feels hurt by this. Both may exchange Christmas greetings for a year or two，perhaps a few letters for a while— then no more. If the same two people meet again by chance，even years later，they pick up the friendship. This can be quite difficult for us Chinese to understand，because friendships between us develop more slowly but then may become lifelong feelings，extending (延伸) sometimes deeply into both families.

Americans are ready to receive us foreigners at their homes，share their holidays，and their home life. They will enjoy welcoming us and be pleased if we accept their hospitality (好客) easily.

Another difficult point for us Chinese to understand Americans is that although they include us warmly in their personal everyday lives，they don’t show their politeness to us if it requires a great deal of time. This is usually the opposite of the practice in our country where we may be generous with our time. Sometimes，we，as hosts，will appear at airports even in the middle of the night to meet a friend. We may take days off to act as guides to our foreign friends. The Americans，however，express their welcome usually at homes，but truly can not manage the time to do a great deal with a visitor outside their daily routine. They will probably expect us to get ourselves from the airport to our own hotel by bus. And they expect that we will phone them from there. Once we arrive at their homes，the welcome will be full，warm and real. We will find ourselves treated hospitably.

For the Americans，it is often considered more friendly to invite a friend to their homes than to go to restaurants，except for purely business matters. So accept their hospitality at home!

小题1:Which of the following statements is TRUE according to the passage?　　

A．Friendships between Americans usually extend deeply into their families.

B．Friendships between Americans usually last for all their lives.　　

C．Americans always show their warmth even if they are very busy.　　

D．Americans will continue their friendships again even after a long break.小题2: From the last two paragraphs we can learn that when we arrive in America to visit an American friend，we will probably be ______.

A．warmly welcomed at the airport

B．offered a ride to his home

C．treated hospitably at his home

D．treated to dinner in a restaurant小题3:The underlined words “generous with our time” in Paragraph 3 probably mean ______.

A．strict with time　　　

B．willing to spend time　　

C．careful with time

D．serious with time小题4:A suitable title for this passage would probably be “______”.

A．Friendships between Chinese

B．Friendships between Americans　　

C．Americans’hospitality

D．Americans’and Chinese’s views of friendships

默写、填空（15分）

小题1:             ，不是清泉，是天上虹              ，沉淀着彩虹似的梦。

小题2:惨象，已使我目不忍视；                ，                  。

小题3:书生意气，挥斥方遒。          ，              ，                   。

小题4:她静默地远了，远了，             ，             。

小题5:春花秋月何时了，往事知多少？                  ，                     。

小题6:与君离别意，同是宦游人。                  ，                       。

小题7:现代著名剧作家          先生的《包身工》一文写于1935年，现在读起来仍有深深的震撼。文中有一个被摧残得骨瘦如柴的小姑娘，大家就拿 “           ”当她的名字。

在下列Java组件中，不属于容器的是______。

A．Panel

B．Window

C．Frame

D．Label

企业进行短期经营决策分析时，( )。

A．无须考虑货币的时间价值

B．投资额较大时应考虑货币的时间价值

C．必须考虑货币的时间价值

D．除物资采购投资之外的短期经营决策都要考虑货币的时间价值