Question

It's difficult to ____ one state of matter from another.A differ B vary C distinguish D change

It's difficult to ____ one state of matter from another.
A differ B vary C distinguish D change
选哪个？为什么？

Answer 1

C

distinguish from 辨别, 识别
Some people find it difficult to distinguish right from wrong.
一些人认为很难辨对与错。

显示出特性; 将…与…区别开
Their uniforms distinguish soldiers, sailors and marines from each other.
从他们的军服可分清他们是陆军士兵、水兵和海军陆战队战士。
Elephants are distinguished from other animals by their long noses.
大象以其长长的鼻子显示出与其他动物的不同。

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追答

很难将一种物质形态同另一种区分开

Answer 2

B
改变物质的形态很困难。
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Answer 3

C
vary... from 与...不同（变化，动态）
differ...from 与……不同（强调不同，静态）
distinguish...from 从……中区分
divide...into 把……分成