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【多选题】
空气介质过滤除菌的原理有( )A.
布朗扩散截留作用
B.
惯性撞击截留作用
C.
拦截截留作用
D.
重力沉降作用
E.
静电吸引作用
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反馈参考答案：
举一反三
【单选题】When teaching speaking what is the first and most important task for a language teacher?
A.
Trying to design suitable speaking tasks for learners.
B.
Setting various kinds of tasks for learners to train their oral competence.
C.
Adjusting their ways of assessing learners’ spoken language.
D.
Encouraging learners to speak up the language they are learning.
【简答题】What is the significant distinction between Task 1 and Task 2 of IELTS Writing?
【单选题】What is the main task of the lubrication oil in the engine?
A.
To lubricate and cool the engine
B.
To lubricate the engine
C.
To transfer heat out of the engine (cooling)
D.
To keep the crankcase clear and free of deposit
【单选题】What is the first task of the advocators of cultural diversity?
A.
To negotiate with the United States of America.
B.
To revise some of the articles of the WTO.
C.
To subordinate the Convention to the WTO and others.
D.
To avoid the influence of information technology.
【单选题】What is the first task of the advocators of cultural diversity?
A.
To negotiate with the United States of America.
B.
To revise some of the articles of WTO.
C.
To subordinate the Convention to WTO and others.
D.
To avoid the influence of information technology.
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