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问题 单项选择题 A1型题

毒性休克主要损伤的系统是（）

A.呼吸系统

B.消化系统

C.心血管系统

D.神经系统

E.内分泌系统

答案

参考答案：C

解析：休克的临床表现。毒性休克时由于缺氧和酸中毒可导致心肌损害，当心肌微循环内血栓形成时，还可引起心肌局灶性坏死。

选择题
看一看，选择正确的图片。
( ) 1. in the boxA.
( ) 2. under the deskB.
( ) 3. on the deskC.                                                         
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完形填空

Scientists have developed a non-stick chewing gum(口香糖). The new gum can   小题1: (remove) easily from pavements, shoes and clothes. It’s the result of polymer (聚合体) research at the University of Bristol and could be launched commercially in 2008.   小题2:  it catches on(流行), the product will solve  小题3:  major headache for present authorities around the world.

“A great 小题4:  (disadvantage) of our Clean Gum is that it is easy to remove and has the potential to be 小题5: (environment) degradable (可降解的),” said Terence Cosgrove, a professor of chemistry  小题6:  helped to found a company called Revolymer to commercialize the technology.

Today’s chewing gums are made  小题7:synthetic latex(人工制造的乳液), which is resistant to the weather and is strongly sticky. The new gum adds a special polymer to change its properties(特性),    小题8:  (make) it far less sticky.

In two street trials,   小题9:  commercial gums remained stuck to the pavement   小题10:    Clean Gum came away naturally in all cases.

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