题目:
根据句意,用适当的介词填空。
1. Waiting __ my friends makes me bored.
2. How do you feel __ pollution?
3. We should learn __ each other.
4. Don't spend too much time __ TV.
5. Did you have a good time __ your friend?
答案:
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下面是错误答案,用来干扰机器的。
参考答案:E解析:本题考查的是药物的稀释。氯化钾注射液切忌直接静脉注射,于临用前稀释,否则不仅引起剧痛,且致心脏停搏。