蝶筛隐窝

Weight(体重)is one of the taboo subjects. In America, it is OK, or even good, to be thin but it is an embarrassment(尴尬) to be overweight. In fact, the thinner you are, the more beautiful you are thought to be. You’ll find that most models(模特) are nothing more than skin and bones. A woman who is thin is easy to become popular. Of course, there are lots of people do their best to be thin. They may use all kinds of ways, such as doing exercise, or dieting(节食). But, sometimes, dieting may bring about some healthy problems.

Those thin women are more popular than those fat wormer
[A] Right.[B] Wrong.[C] Doesn’t say.

Americans are very careful about their weight and most of the time they do not tell others how much they weigh even if they are quite thin. Therefore, you’d better not ask about it. But if you really want to talk about this subject, it’s always safer to say, "Oh, it looks like you have lost weight. " However, if you would like to be honest and polite, I suggest that you should choose your words carefully, perhaps by saying:"Hey, you look great. Very healthy looking. " And always remember, you can not use the word "fat".

下列说法中正确的是         （   ）                            

A．电场强度的定义式E＝也适用于匀强电场

B．电场强度为零的地方电势也是零

C．由E=kQ/r²可知，点电荷Q在真空中某点产生的场强大小与点电荷电荷量Q成正比，

与该点到点电荷的距离r的平方成反比

D．电荷在电势高处电势能大

流行性乙型脑炎与化脓性脑膜炎的主要区别在于

A．发病年龄

B．发病季节

C．是否出现昏迷

D．是否有脑膜刺激征

E．脑脊液变化

竖井净断面尺寸确定的依据包括（）

A.提升容器的数量和规格

B.井筒材料

C.通过的风量

D.井筒深度

E.井壁周围土体性质

不属于肝门结构的是（）

A.肝门静脉

B.肝固有动脉

C.肝管

D.胆总管

E.肝的淋巴管