药物导致的异常免疫反应，称为

A.副作用
B.毒性反应
C.变态反应
D.后遗效应
E.二重感染

参考答案：C

继发性反应是指长期应用广谱抗生素，敏感菌被抑制，不敏感菌乘机大量繁殖而导致的二重感染。副作用是药物治疗量时出现的与治疗无关的作用。药物导致的异常免疫反应是一种变态反应。药物剂量过大或药物在体内蓄积过多时发生的危害性反应称为毒性反应。血药浓度已降至有效浓度之下时残存的药理效应称为后遗效应。

There has been a__________lack of communication between the union and the management.

What role does the teacher play at the feedback stage?

--How many boy students are there in your class?--There are __________girls as boys.

Which of the following is NOT a suitable pre-reading activity?

Which of the following activities helps to train the skill of listening for gist?

What's the overall goal of English teaching in basic education stage?

在语法教学中，语法练习的形式有哪几种(10分)?请对任意两种练习形式进行举例说明(10分)。

I'm sure that your letter will get__________attention. They know you're waiting for the reply.

What should the teacher try to avoid when selecting listening materials?

Farmers are allowed to grow small gardens of their own and they sell their vegetables__________ the black market.

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