题干

我国古代数学名著《孙子算经》中记载了一道数学趣题:一百马,一百瓦,大马一个拖三个,小马三个拖一个.大意是:100匹马恰好拉了100片瓦,已知一匹大马能拉3片瓦,3匹小马能拉1片瓦,问有多少匹大马、多少匹小马?若设大马有x匹,小马有y匹,那么可列方程组为(   )

A:{x+y=1003x+3y=100

B:{x+y=100x+3y=100

C:{x+y=1003x+13y=100 

D:{x+y=1003x+y=100

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答案(点此获取答案解析)

C

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     Some people make you feel comfortable when they are around. You spend an hour with them and feel as if you have known them half your life. ____ .

    Here are several skills that good talkers have. If you follow the skills, they'll help you put people at their ease, and make friends with them quickly.

    First of all, good talkers ask questions. ____ . One well-known businesswoman says, “At business lunches, I always ask people what they did that morning. It's a common question,but it will get things going.” From there you can move on to other matters—sometimes to really personal questions. ____ . Second, once good talkers have asked questions, they listen to the answers .This point seems clear, but it isn't. Your questions should have a point and help to tell what sort of person you are talking to. And to find out, you really have to listen carefully and attentively.

    ____ . If someone sticks to one topic, you can take it as a fact that he's really interested in it. Real listening also means not just listening to words, but to tones of voice. If the voice sounds dull, then, it's time for you to change the subject.

    Finally, good talkers know well how to deal with the occasion of parting. If you're saying goodbye, you may give him a firm handshake and say, “I've really enjoyed meeting you.” ____ . Let people know what you feel, and they may walk away feeling as if they've known you half their life.

A. Real listening at least means some things.

B. You can become a popular person.

C. Almost anyone, no matter how shy he is, will answer a question.

D. And how he answers will let you know how far you can go.

E. If you want to see that person again, don't keep it a secret.

F. It's polite to listen to others with a smile.

G. These people have something in common.