下列液体中，不会出现丁达尔效应的分散系是（ ）
①鸡蛋白溶液 ②水 ③淀粉溶液 ④硫酸钠溶液 ⑤沸水中滴入饱和FeCl3溶液 ⑥肥皂水．
A．④
B．①③
C．⑤⑥
D．②
①鸡蛋白溶液是胶体，故①错误；
②水不是胶体，没有丁达尔效应，故②错误；
③淀粉溶液是胶体，故③错误；
④硫酸钠溶液是溶液不是胶体，故④正确；
⑤沸水中滴入饱和FeCl3溶液生成氢氧化铁胶体，故⑤错误；
⑥肥皂水是胶体，故⑥错误；
故选A．
We are always using body language in our daily life．When we have a conversation with someone，we may be using more body language than words．However，the same body language may mean different things in different countries．That’s why people sometimes do not understand each other correctly．Pointing to one part of the body can mean differently in different cultures． For example，in the U．S．A．people point to their heads when they think someone is clever．However，in Europe it means“He or she is stupid or something is wrong with his or her head．” In our Chinese culture，nodding our head up and down means“yes”and shaking our head from side to side means“no”．However，in parts of India，Greece and Turkey，it means just the opposite． In England or the U．S．A．，when you raise your hand and make a circle with the thumb(拇指)and the second finger，it means“You’re all right or everything is OK．”However，if we do this in France or Belgium，it means“You’re worth zero．”In Greece or Turkey，we should not make this gesture，or we will be thought to be very rude． The meaning of gestures can also change over time．In the 1960s，the V sign meant“peace”．However，during World War Ⅱ，it meant“victory”．In Greece，it is a very insulting (污辱性)sign． Though the meaning of body language is different, there are some expressions having the same meaning all over the world, such as smiling and crying． 根据短文内容．用简洁的句子或短语完成下列表格。
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