We must ________ that the experiment is controlled as rigidly as possible.

试卷相关题目

• 1When she saw the clouds she went back to the house to ________ her umbrell

  A.A.carry

  B.fetch

  C.bring

  D.reach

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• 2Nowadays advertising costs are no longer in reasonable ________ to the total cost of the product.

  A.proportion

  B.correlation

  C.connection

  D.correspondence

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• 3The book contained a large ________ of information.

  A.deal

  B.amount

  C.number

  D.sum

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• 4Michael found it difficult to get his British jokes ________ to American audiences.

  A.around

  B.over

  C.across

  D.down

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• 5She refused to ________ the car keys to her husband until he had promised to wear his safety belt.

  A.hand in

  B.hand out

  C.hand down

  D.hand over

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• 6He was knocked down by a car and badly ________.

  A.injured

  B.damaged

  C.harmed

  D.ruined

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• 7Venus is similar to Earth in ________.

  A.size and density

  B.distance from the sun

  C.having atmosphere

  D.all of the above

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• 8The greatest value in studying Venus should be to ________.

  A.allow us to visit there

  B.understand Earth better

  C.find a new source of energy

  D.promote a new space program

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• 9The main idea of this passage is about ________.

  A.problems of space travel

  B.scientific methods in space exploration

  C.the importance of Venus to Earth

  D.conditions on Venus

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• 10The expression “snake through central Rome” probably means “to move ________

  A.quietly through central Rome.”

  B.violently through central Rome.”

  C.in a long winding line through central Rome.”

  D.at a leisurely pace through central Rom

  E.”

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