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读句子,选答语。( ) 1. Who's your math teacher?(

题型:补全对话,情景问答

题目:

读句子,选答语。
( ) 1. Who's your math teacher?
( ) 2. How many books do you have?
( ) 3. What colour is your English book?
( ) 4. Do you like sports?
( ) 5. What's in your schoolbag?
A. Red and yellow.
B. Yes, I do.
C. Mr Black.
D. Forty-eight.
E. Many books.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:去污染是指人为地将机体的正常菌群或已定植的细菌,部分或全部去除的一种防止感染措施,而不仅仅是外来致病菌。在术前给予患者广谱抗生素,达到"绝对无菌"不能防止术后感染,这种全部去污染的方...

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