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【单选题】
Why in Lamb's eyes most black and Asian people do not mind the words at all?A.
They have been fed up with such word play and tricks.
B.
They know that there is no substantial change at all.
C.
What they care is the association of the words, not the words themselves.
D.
They are apathetic to such political issues, for they are so far from them.
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举一反三
【简答题】实验证明:拉(压)杆的横向应变与纵向应变的比值为一 量,称为 。
【单选题】关于胶体和溶液的区别,下列叙述中正确的是
A.
溶液呈电中性，胶体带有电荷
B.
溶液中溶质粒子能通过滤纸，胶体中分散质粒子不能通过滤纸
C.
溶液中通过一束光线没有特殊现象，胶体中通过一束光线出现明显光带
D.
溶液稳定，放置后不会生成沉淀；胶体不稳定，放置会生成沉淀
【单选题】关于胶体和溶液的区别，下列叙述中正确的是
A.
溶液呈电中性，胶体带有电荷
B.
溶液中溶质微粒可透过滤纸，胶体中分散质微粒不可透过滤纸
C.
溶液中溶质微粒作有规律的运动，胶体粒子运动无规律
D.
溶液中通过一束光，无特殊现象，而胶体中有“光亮的通路”
【简答题】c ________v.to talk casually about things that are not serious or important
【简答题】v. to talk casually about things
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