补全对话。从对话后的选项中选出能填入空白处的最佳选项。（其中有两项是多余的。）
A: Welcome to I COOL, YOU COOL, madam. How can I help you?
B:____ .
A: This way, please. These are the latest fashion.____ 
B: It looks cool. But I don't like bright green.
A: We've got many colors: pink, grey, dark red and yellow.____ . 
B: Pink. Could you show me the light pink one?
A:____ . And it's very thick.
B: I like it.____ .
A: It was 100 dollars but now it is only 50 dollars.
B: That's a great price. I'll take it.

下列诗句都出自我国古代的文学作品，请用简要的语言阐述其中所包含的物理知识．

（1）一叶障目，不见泰山 ____．

（2）池水照明月 ____．

（3）潭清疑水浅　 ____

粗盐中含有不溶性杂质（泥沙等）和可溶性杂质（氯化钙、氯化镁等）．