The Palace Museum is about five _____ ye

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问题选择题

The Palace Museum is about five _____ years old.

A. hundred
B. hundreds
C. hundredes

答案

答案：A

单项选择题

下列哪项通常可用涡流法检测？（）

A.电导率的测量或电导率和磁导率的测量

B.薄金属片、包壳或涂层厚度的测量

C.表面和近表面下缺陷的测量

D.上述三项都是

听力题

根据句意，写出括号内所给单词的适当形式。

小题1:It seemed that there were as many (Asia) as there were Canadians.

小题2:Dolly is the first (clone) sheep in the lab.

小题3:True (friend) is worth more than money.

小题4:Because of heavy work, many students feel (sleep) in afternoon classes.