搜题请搜索小程序“爱下问搜题”
问题 单项选择题

在药品价格管理中，医疗机构必须执行并不得擅自提高价格的药品是( )

A．政府定价、政府指导价

B．企业定价

C．企业指导价

D．政府指导价

E．市场调节价

答案

参考答案：A

解答题

单克隆抗体在肿瘤治疗方面有广泛的应用．单克隆抗体制备过程如图所示．

（1）利用该抗体进行治疗属于______免疫．而细菌性痢疾属于消化道传染病，主要通过饮水和食物传播．其病原体经口进入消化道后，大部分被胃酸杀灭，人体的这种生理功能称为______免疫．

（2）为防治肿瘤，该病人自己购买了某药物，其包装袋上印有“OTC”字样，这种药属于______药．

（3）与引起消化道传染病的细菌不同，引起病毒性流感的病原体是病毒，病毒在结构上与细菌的不同之处是______．
查看答案
单项选择题

Over the last 40 years there has been a great increase not only in the number of agricultural pesticides in use but also in the care and sophistication with which they are used by farmers. Nevertheless, the proportion of agricultural crops lost to certain pests worldwide has increased over the same period, even when the pests concerned have not developed resistance to existing pesticides.
Which of the following, if true, best explains how improvements in pesticide use have been accompanied by greater losses to certain pests

A．Some dangerous but relatively ineffective pesticides common 40 years ago are no longer in widespread use.

B．As pesticides have become increasingly pest-specific, controlling certain pests with pesticides has turned out to cost more in many cases than the value of crop losses caused by those pests.

C．Because today’s pesticides typically have more specific application conditions than did pesticides in use 40 years ago, today’s farmers observe their fields more closely than did farmers 40 years ago.

D．Certain pest-control methods that some farmers use today do not involve the use of chemical pesticides but are just as effective in eliminating insect pests as those that do.

E．(E) Forty years ago, much less was known about the effects of pesticides on humans and other mammalian species than is now known.
查看答案