________ the surface of metal, but also weakens it.

试卷相关题目

• 1The _____largest state is, and has been since Alaska’s admission into the Union, Califori

  A.A.three

  B.third

  C.first third

  D.most

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• 2Mumps ____ a very common disease which usually affects children.

  A.was

  B.is

  C.are

  D.were

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• 3Human behavior is mostly a product of learning, ______the  behavior of animal depends mainly on instinct.

  A.whereas

  B.so

  C.unless

  D.that

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• 4The sick _______and the lost _____.

  A.have cured; have found

  B.has cured; has found

  C.have been cured; have been found

  D.has been cured; has been found

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• 5No visitor or relative can enter the patient’s room unless _____ by the doctor.

  A.they are invited

  B.he is invited

  C.invited

  D.been invited

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• 6It’s nice to go for a walk __ a summer evening.

  A.on

  B.in

  C.at

  D.during

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• 7"Are these two issues settled、""No, they still were _____ conflict."

  A.during

  B.on

  C.with

  D.in

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• 8"Did the medicine make you feel better、""No, ______ the worse I feel."

  A.taking more medicine

  B.the most medicine I take

  C.the more medicine I take

  D.when I take more medicine

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• 9His health is _________.

  A.as poor, if not poorer than, his sister

  B.poor as his sisters if not poorer

  C.as poor as, if not poorer than, his sister’s

  D.as poor, if not poorer than his sister’s

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• 10Susanne had worked for three years to be a computer analyst but found her progress ________.

  A.discouraging and unsatisfied

  B.discourageable and dissatisfaction

  C.discouraging an dissatisfaction

  D.unsatisfactory and discouraging

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