试题与答案

当柴油发动机调速器失效而喷油量过大,最大油量限止螺钉调整不当时,有()现象。A、排气

题型:单项选择题

题目:

当柴油发动机调速器失效而喷油量过大,最大油量限止螺钉调整不当时,有()现象。

A、排气冒黑烟

B、排气冒白烟

C、排气冒蓝烟

D、运转不均匀

答案:

参考答案:A

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题型:填空题

Questions 9-13


·You will hearfive people giving reasons why children learn their mother tongue so well.
·Before you listen, read the list of statements, five of which are summaries of what they were saying.
·Then listen carefully and match the statements (A-F) with the people who said them (9-13) respectively.
·There is one extra statement that you don’t need to use. You will hear the passage twice.
9. Maggie: ______
  • A. The time of their learning the mother tongue is the most
    favorable of all.
    10. Cherry: ______
  • B. Children hear their native language spoken always in its
    genuine form.
    11. Mike: ______
  • C. Children have private lessons all the time to learn their mother
    tongue.
    12. Hazel: ______
  • D. Children hear their native language spoken in all possible
    situations.
    13. Jody: ______
  • E. Children have special teachers to teach them.
  • F. Children have flexible organs and sensitive ear.

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