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题目
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Fleming discovered penicillin almost by______.
A.experimentB.handC.accidentD.theory

答案
C
解析

核心考点
试题【Fleming discovered penicillin almost by______.A.experimentB.handC.accidentD.theo】;主要考察你对名词等知识点的理解。[详细]
举一反三

On Feb. 6, Xi’an – Zhenzhou High – Speed Railway,_________first high – speed railway in_______West China, was put into operation.
A.不填;theB.the; theC.the; 不填D.不填;不填

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The woman scientist was so busy that she could hardly_______ time to her children.
A.spendB.devoteC.offerD.provide

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--- I’ve told her many times, and she still forgot about it!
--- I understand. It’s true that she_______be very forgetful sometimes.
A.canB.wouldC.shouldD.must

题型:不详难度:| 查看答案

She thought _______impossible to finish so much work in a day.
A.thisB.thatC.itsD.it

题型:不详难度:| 查看答案

It is becoming more and more difficult to_______the problems of traffic in some big cities of our country.
A.deal withB.set upC.put awayD.break down

题型:不详难度:| 查看答案
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