阅读理解。

     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。选项中有两项为

多余选项。

     The Internet has opened up a whole new online world for us to meet, chat and go where we've never

been before.

     But just as in face to face communication, there are some rules of behavior that should be followed

when on line.   1   Imagine how you'd feel if you were in the other person's shoes.

     For anything you're about to send, ask yourself, "Would I say this to the person's face?" If the answer

is no, rewrite and reread.   2  

     If someone in the chat room is rude to you, your instinct (本能) is to fire back in the same manner.

But try not to do so.  3   If it was caused by a disagreement with another member, try to fix the situation

肾结石行体外冲击波碎石主要禁忌是

A．高血压

B．糖尿病

C．前列腺增生

D．结石急性发作

E．输尿管狭窄