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问题 单项选择题

能与左旋多巴组成复方制剂美多巴的药物是

A．维生素B6

B．利血平

C．卡比多巴

D．苄丝肼

E．氯丙嗪

答案

参考答案：D

解析：苄丝肼与左旋多巴按1:4配伍组成的复方制剂称为美多巴。

判断题

对产地与报关地不同的出境法检货物，报检人应向产地检验检疫机构申请签发《出境货物通关单》办理通关手续。（）
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单项选择题

Some doomsayers are warning that long-range warming or cooling trends in weather patterns will drastically reduce grain production. More optimistic reports, however, point out that, even if such drifts in average temperature do occur, we should expect little change in grain production because there is little evidence that changes in rainfall patterns will occur. Moreover, for most crops, climate-induced yield trends will be masked by both the year-to-year fluctuation of yields and by the enhancement of yields because of technological factors. Which of the following is an assumption on which the more optimistic reports mentioned in the passage are based

A．Long-range changes in weather patterns cannot be accurately predicted.

B．The growing of grain is so highly dependent on technological factors that improvements in yield are unlikely, regardless of climatic conditions.

C．Trends in rainfall patterns are more difficult to isolate than are trends in temperature.

D．Long-range warming or cooling trends are more damaging to grain production if they are accompanied by changes in rainfall patterns than if they are not.

E．(E) Long-range cooling trends are potentially more destructive to grain production than are long-range warming trends.
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