2. 外语
  3. Diffusion is the spontaneous spreading of matter caused by the random movement of molecules.

Diffusion is the spontaneous spreading of matter caused by the random movement of molecules.

admin2009-07-11  57
问题 Diffusion is the spontaneous spreading of matter caused by the random movement of molecules.
选项 A、pattern1ess
B、whirling
C、constant
D、rampant
答案A
解析 random与pattern1ess同义，意为“随便的，胡乱的，任意的”。
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