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问题 单项选择题

一用于食品的化合物需进行三阶段毒理学评价。现已有大、小鼠经口LD，蓄积试验，Ames试验，代谢试验，致畸试验的结果，还需进行的试验有（）

A.骨髓细胞微核试验、骨髓细胞染色体畸变试验、睾丸细胞染色体畸变试验、30/90天喂养试验、繁殖试验

B.骨髓细胞微核试验、骨髓细胞染色体畸变试验、精子畸形试验、30/90天喂养试验、致癌试验

C.骨髓细胞微核试验、姐妹染色单体交换试验、睾丸细胞染色体畸变试验、慢性毒性试验、繁殖试验

D.骨髓细胞微核试验、骨髓细胞染色体畸变试验、UDS皮肤黏膜刺激试验、繁殖试验

E.骨髓细胞微核试验、骨髓细胞染色体畸变试验、睾丸细胞染色体畸变试验、30/90天喂养试验、致癌试验

答案

参考答案：A

选择题

—How long has the film _______?

—For ten minutes.        [ ]

A. began            

B. been on          

C. begun
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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) .

15（）

A.possibly

B.liable

C.logical

D.likely
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