"Pollution" is a _______.
A. Countable Noun
B. Non-Countable Noun
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"Bicycle" is a ______.
A. Countable Noun
B. Non-Countable Noun
Which one of the following sentences is correct?
A. There is too much pollution these days.
B. There are too many pollution these days.
Which of the following ways is not the best way to disagree with someone.
A. I'm not sure if I agree with you.
B. I don't really agree _______.
C. No.
诊断制剂的作用是( )传染源。
A. 预防
B. 诊断
C. 治疗
D. 中和
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