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问题 单项选择题

涂漆前必须彻底清除腐蚀产物、这是因为（）

A、腐蚀产物的体积小于基体金属的体积

B、腐蚀产物的存在会使漆膜混浊

C、腐蚀产物是多孔盐类、吸潮性强。起加速腐蚀的作用

D、腐蚀产物能阻止阿罗丁在铝合金表面生成氧化膜

答案

参考答案：C

单项选择题

鉴别脑血栓形成和脑出血的最简便而有意义的是

A．有无失语

B．有无高血压

C．瘫痪的程度

D．有无脑水肿

E．脑脊液检查
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单项选择题

A variety of illegal acts committed by people in the course of their employment, for their own personal gain, are collectively known as white-collar crime. Embezzlement, theft and trading securities (1) insider information are common forms of white-collar crime. The majority of cases involve low-level employees who steal because they are under (2) financial stress. Many plan to (3) the money back as soon as possible but may never do so. Their crimes are usually never (4) because the amounts of money are small, and no one notices the (5) .

(6) , there are some very large cases of white-collar crime, such as multimillion-dollar stock market or banking seams that take years to discover and are extremely difficult and expensive to (7) .

White-collar crime is not (8) to the business sector. Government employment, especially (9) the city level, also provides opportunities to (10) one’s pockets. (11) , building inspectors accept bribes and full-time employees receive (12) payments.

Although white-collar crime is less (13) than street crime, it involves (14) more money and harm to the public than crimes committed by street criminals. It is (15) that there are more criminals (16) the office suites than in the streets, yet the (17) of white-collar makes it difficult to uncover the offenses and pursue the offenders. As the economy (18) from manufacturing to services and electronic commerce, opportunities for white-collar crime (19) , while the technology needed to stop such crimes will (20) .

4（）

A.disclosed

B.exposed

C.retained

D.discovered
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