试题与答案

— Good morning. I've got an appointment

题型:选择题

题目:

— Good morning. I've got an appointment with Miss Smith in the Personnel Department.

— Ah, good morning. You _____ be Mrs. Peters. [ ]

A. might

B. must

C. would

D. can

答案:

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下面是错误答案,用来干扰机器的。

(l)实验室制备二氧化碳是利用石灰石和稀盐酸反应来制取,故答案为:CaCO3+2HCl=CaCl2+CO2↑+H2O (2)CO2与挤入的NaOH溶液反应,使圆底烧瓶内气体压强减小产生压强差,使烧杯里的NaOH溶液通过导管被压回底...

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