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问题 判断题

规定双动道岔距信号楼近者为一动。

答案

参考答案：对

单项选择题

适用于大型金属表面的一种新型高效的机械除锈方法是（）。

A.滚磨法

B.无尘喷砂法

C.高压水流法

D.高压气流法
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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
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