实验是学习化学的重要手段．下列实验操作正确的是（ ） A． 倾倒液体 B．

阑尾炎或急性胰腺炎（）

A．呕吐后上腹部舒适

B．呕吐物粪臭味每腹痛加重则呕吐加剧

C．呕酸臭味隔夜食物

D．恶心呕吐反复发生，且呕吐后上腹无舒适感

E．呕吐呈喷射状，无明显恶心感

起重机由起吊位置在达到运行通道前的运行，吊物应高出其越过地面最高设备（）为宜。

A、1米

B、0.5米

C、1.5米

D、2米

阅读理解

     America is a mobile society. Friendships between Americans can be close andreal, 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 flower 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

activities. 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!

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

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

B. Americans will continue their friendships again even after a long break.

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

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

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. treated hospitably at his home      

B. offered a ride to his home

C. warmly welcomed at the airport

D. treated to dinner in a restaurant

3. The underlined words "generous with our time" in Paragraph 3 probably mean ______.

A. strict with time                  

B. serious with time

C. willing to spend time            

D. careful with time

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 opinions of friendships

有追索权保理业务的特点是（）。

A.卖方企业向银行转让应收账款，取得货币资金后可增加现金流，加速资金周转

B.银行分担企业的应收账款管理和催收工作

C.卖方企业不承担因赊销带来的收账风险

D.如银行到期未收到买方付款，则由卖方按约定无条件回购该应收账款

下列有关总线的描述，不正确的是

A．总线分为内部总线和外部总线

B．内部总线也称为片总线

C．总线的英文表示就是Bus

D．总线体现在硬件上就是计算机主板