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问题 单项选择题

焊接接头包括焊缝区、熔合区和（）

A.部分母材区

B.部分组织转变区

C.热影响区

D.粗晶区

答案

参考答案：C

填空题
选择适当的代词把句子补充完整。
A. You    B. her    C. something    D. either    E. neither    F. each
1. There are two bags in the room. But _____________ of them is new.
2. My watch doesn't work. I think _____________ must be wrong with it.
3. I am John. _____________ are Tom.
4. Both Japanese and French are new to me. I don't know _____________ of them.
5. There are many buildings on _____________ side of the street.
6. Where's Mrs. Brown? I am looking for _____________.
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单项选择题 A1型题

人感染高致病性禽流感主要是指（）

A.H5N1感染

B.H1N1感染

C.H9N2感染

D.H3N2感染

E.H7N3感染
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