题干

如图所示,纵坐标表示两个分子间引力、斥力的大小,横坐标表示两个分子的距离,图中两条曲线分别表示两分子间引力、斥力的大小随分子间距离的变化关系,e为两曲线的交点,则下列说法正确的是(     )

A:ab为引力曲线,cd为斥力曲线,e点横坐标的数量级为10-10m

B:ab为斥力曲线,cd为引力曲线,e点横坐标的数量级为10-10m

C:若两个分子间距离大于e点的横坐标,则分子间作用力表现为斥力

D:若两个分子间距离越大,则分子势能亦越大

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A

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根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。

    It is important to introduce yourself in a creative, memorable way to distinguish yourself from the crowd. ____ Since being witty(言辞诙谐的) doesn't always come easily, try one of these creative introductions and separate yourself from the rest.

    Write your first or last name on a piece of paper.____ So if your name is Tom, you might say you are tireless, optimistic and mild.

    ____ Then say that you will do so in the words of your“best and worst critic”— your mother. By breaking the ice in this way, you can go on in either a humorous or serious fashion.

    Introduce yourself silently, by drawing a picture of yourself on a large sheet of paper.____  In fact, in some situations, it may be better if you don't. Put a title at the top of your drawing, if you like, such as “Hello! This is me.”

    Turn the traditional introduction upside down by describing yourself in exactly opposite terms of who you are. Have fun with this“back door approach”, and keep people guessing just how much you are exaggerating(夸张).____  Don't bother calling me tomorrow, because I will be hiding in a closet. Send text messages to my girlfriend while I drink a Bud Light on the job.

A. This introduction requires you to be gifted in art.

B. Freely admit that you don't like talking about yourself.

C. It doesn't matter whether you have artistic abilities or not.

D. For example: I am probaby the laziest person you will ever meet.

E. Use each letter as the first letter in an adjective that describes you.

F. Bring in the surprise factor— sometimes known as the shock factor.

G. After all, anybody can stand up and announce their name, business title and job responsibilities.