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【单选题】
当乙酸分子的氧都是O-18,乙醇分子的氧都是O-16,二者在一定条件下达到平衡时,平衡混合物中生成水的相对分子质量是( )A.
16
B.
18
C.
20
D.
22
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【单选题】Clerk: Good morning, sir. Can I help you? Customer: Can I refund this TV? Clerk: What happened to it? Is there anything wrong with it? Customer: No, I just don't need it. Q: What does the customer wan...
A.
Return it and get his money back.
B.
Change it for a new one.
C.
Rent it for a few days.
D.
Change it for other things.
【简答题】Listen to the two speakers in a similar conversation. Explain
why the second conversation is better. Give as many reasons as you can.
【简答题】听下面一段对话，回答第1～3三个小题。 1. What's the relationship (关系) of the two speakers in the talk? [ ] A. Teacher and student B. Mother and son C. Classmates 2. How did Bob's family go to Yangshuo? [ ] A. B...
【简答题】机动车辆的风险因素中社会环境风险因素有哪些?
【简答题】I want to rent a new apartment that is ______ (comfortable)than this one．
【简答题】I want to rent a new apartment that is (comfortable) ________than this one. (03.12)
【简答题】机动车辆的风险因素中社会环境风险因素有哪些?
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