High-speed trains travel at 300kilometers an hour.which is about normal trains．( )A．four times the speed asB．the speed four times ofC．four times as the speed ofD．four times the speed of 题目和参考答案——青夏教育精英家教网——

题目内容

13．High-speed trains travel at 300kilometers an hour，which is about normal trains．（　　）

	A．	four times the speed as		B．	the speed four times of
	C．	four times as the speed of		D．	four times the speed of

分析高铁每小时行驶三百公里，这速度大约是普通列车的四倍．

解答答案：D
句意表达的是倍数；倍数的表示法有三种：倍数+as…as…；倍数+比较级+than；倍数+the size/length/weight/wideth/height/speed of．故选D．

点评本题考查倍数表示法．英语中倍数的表示法有三种：倍数+as…as…；倍数+比较级+than；倍数+the size/length/weight/wideth/height of．学习时，要注意区分和掌握．

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