The ratio of the work done by the machine _________ the work done on it is called the efficiency of the machine.

您可能感兴趣的试题

• 1 Up went the prices and _________

  A) the living standard came down

  B) down did the living standard come

  C) came down the living standard

  D) down came the living standard

  点击查看答案进入在线练题题不想做，我帮你做
• 2 There is no doubt __________Herbert is the most industrious student in our class.

  A) whether

  B) what

  C) that

  D) if

  点击查看答案进入在线练题题不想做，我帮你做
• 3 The projects __________ by the end of 2002 will expand the city's telephone network to cover 1,000,

  A) being accomplished

  B) to be accomplished

  C) accomplished

  D) having been accomplished

  点击查看答案进入在线练题题不想做，我帮你做
• 4 Kevin is the only student in the class __________ failed in the exam.

  A) who

  B) that

  C) which

  D) whom

  点击查看答案进入在线练题题不想做，我帮你做
• 5 The doctor insisted that Paul's mother __________ examined thoroughly.

  A) would be

  B) must be

  C) be

  D) should have been

  点击查看答案进入在线练题题不想做，我帮你做
• 6 The work they are doing is __________ great value.

  A) in

  B) of

  C) by

  D) from

  点击查看答案进入在线练题题不想做，我帮你做
• 7 I regret __________ the novel to Jim because he made it very dirty.

  A) to lend

  B) having lent

  C) to be lending

  D) lent

  点击查看答案进入在线练题题不想做，我帮你做
• 8 __________, the negotiation went further on.

  A) With the first point agreeing on

  B) With the first point agreed on

  C) With the first point to agree on

  D) With agreeing on the first point

  点击查看答案进入在线练题题不想做，我帮你做
• 9 She moved away from her parents, and missed them __________ enjoy the exciting life in New York.

  A) too much to

  B) enough to

  C) very much to

  D) so much to

  点击查看答案进入在线练题题不想做，我帮你做
• 10 It is high time someone ________ Nick that each member of a team has to do his share of work.

  A) could tell

  B) tell

  C) told

  D) would tell

  点击查看答案进入在线练题题不想做，我帮你做