Codes are a way of writing something in secret; ________, anyone who doesn’t know the code will not be able to read it.

试卷相关题目

• 1You should have put the milk in the ice box; I expect it ________ undrinkable by now.

  A.became

  B.had become

  C.has become

  D.becomes

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• 2Which of the following statements is NOT TRUE、

  A.Body temperature may serve as an indication of a worker’s performance.

  B.The selection of a number of permanent night shift workers has proved to be the best solution to problems of the round-the-clock working system.

  C.Taking body temperature at regular intervals can show how a person adapts to the changes of routine.

  D.Disturbed sleep occurs less frequently among those on permanent night or day shifts.

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• 3It is possible to find out if a person has adapted to the changes of routine by measuring his body temperature because ________.

  A.body temperature changes when the cycle of sleep and wakefulness alternates

  B.body temperature changes when he changes to night shift or back

  C.the temperature reverses when the routine is changed

  D.people have higher temperatures when they are working efficiently

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• 4The best solution for implementing the 24-hour working system seems to be ________.

  A.to change shifts at longer intervals

  B.to have longer shifts

  C.to arrange for some people to work on night shifts only

  D.to create better living conditions for night workers

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• 5The main problem of the round-the-clock working system lies in ________.

  A.the inconveniences brought about to the workers by the introduction of automation

  B.the disturbance of the daily life cycle of workers who have to change shifts too frequently

  C.the fact that people working at night are often less effective

  D.the fact that it is difficult to find a number of good night workers

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• 6His long service with the company was ________ with a present.

  A.admitted

  B.acknowledged

  C.attributed

  D.accepted

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• 7The atmosphere is as much a part of the earth as ________ its soils and the water of its lakes, rivers and oceans.

  A.are

  B.is

  C.do

  D.has

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• 8Our house is about a mile from the station and there are not many houses ________.

  A.in between

  B.among them

  C.far apart

  D.from each other

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• 9The drowning child was saved by Dick’s ________ action.

  A.acute

  B.alert

  C.profound

  D.prompt

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• 10Children and old people do not like having their daily ________ upset.

  A.habit

  B.practice

  C.routine

  D.custom

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