对于焊缝内部缺陷的检查，应采用（）。A.超声波 B.水压试验 C._爱下问搜题

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问题单项选择题

对于焊缝内部缺陷的检查，应采用（）。

A.超声波

B.水压试验

C.着色

D.目测法

答案

参考答案：A

填空题

Questions 9-13

·You will hearfive speakers talking about advantages or disadvantages about cloning.
·For questions 9-13, choose from the list A-F which advantage or disadvantage they are talking about.
·Use the letters only once. There is one extra letter which you do not need to use.
9. Speaker 1: ______
10. Speaker 2: ______
11. Speaker 3: ______
12. Speaker 4: ______
13. Speaker 5: ______

A. The element of uncertainty
B. Reverse the aging process
C. Helping infertile couples
D. Potential benefits to modern medicine
E. Improving food supply
F. The potential for abuse

单项选择题

如图箭头所示为大脑哪个部位（）

A.中脑顶盖

B.后连合

C.四叠体

D.松果体

E.中脑导水管