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问题 选择题

下列名言能体现中 * * 艰苦奋斗传统美德的有[ ]

①阅古今，国与家，成由俭，败由奢

②言必信，行必果

③谁知盘中餐，粒粒皆辛苦

④生当作人杰，死亦为鬼雄

A．①②

B．①③

C．①②③

D．①②③④

答案

答案：B

单项选择题

The United States Food and Drug Administration (FDA) regulates the introduction of new therapeutic agents into the marketplace. Consequently, it plays a critical role in improving health care in the United States. While it is those in the academic and government research communities who engage in the long process of initial discovery and clinical testing of new therapeutic agents, it is the FDA’s role and responsibility to facilitate the transfer of new discoveries from the laboratory to the marketplace. Only after the transfer can important new therapies help patients.
Which one of the following statements can be inferred from the passage

A．The FDA is responsible for ensuring that any therapeutic agent that is marketed is then regulated.

B．Before new therapeutic agents reach the marketplace they do not help patients.

C．The research community is responsible for the excessively long testing period for new drugs, not the FDA.

D．The FDA should work more closely with researchers to ensure that the quality of therapeutic agents is maintained.

E．(E) If a new medical discovery has been transferred from the laboratory to the marketplace, it will help patients.
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单项选择题

不属于人B淋巴细胞膜上的表面标志有( )

A．膜表面免疫球蛋白分子(smIg)
B．Fc受体
C．补体受体
D．丝裂原受体
E．SRBC受体
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