为富不仁wãi fù bù rãn

Read the dialogue and judge. 阅读对话，判断正(√)误(×)。

salesperson: May I help you?

Jenny: Yes! I want to buy a dress, please. Where are the dresses?

salesperson: I'll show you. This way, please. Here they are.

Danny: Excuse me!

salesperson: Yes? May I help you?

Danny: Where is the ice cream?

salesperson: Ice cream? I'm sorry. This department store has shoes, clothes, toys, books and bicycles, but no

                  ice cream.

( ) 1. Jenny wants to buy a dress.    

( ) 2. Danny wants to buy ice cream.    

(     ) 3. Danny buys ice cream.

Questions l-5 are based on Passage One:Passage OneLong bus rides are like television shows. They have a beginning,a middle, and an end-with commercials thrown in every three or four minutes. The commercials are unavoidable. They happen whether you want them or not. Every couple of minutes a billboard glides by outside the bus window. “Buy Super Clean Toothpaste”“Drink Good’n Wet Root Beer.”“Fill up with Pacific Gas.”Only if you sleep, which is equal to turning the television set off,are you spared the unending cry of "You Need It! Buy It Now!"The beginning of the ride is comfortable and somewhat exciting, even if you’ve traveled that way before. Usually some things have changed-new houses, new buildings, sometimes even a new road. The bus driver has a style of driving and it’s fun to try to figure it out the first hour or so. If the driver is particularly reckless or daring, the ride can be as thrilling as a suspense story. Will the driver pass the truck in time Will the driver move into the right or the left-hand lane After a while, of course, the excitement dies down. Sleeping for a while helps pass the middle hours of the ride. Food always makes bus rides more interesting.But you’ve got to be careful of what kind of food you eat. Too much salty food can make youvery thirsty between stops.The end of the ride is somewhat like the beginning. You know it will soon be over and there’s a kind of expectation and excitement in that. The seat, of course, has become harder as the hours have passed. By now you’ve sat with your legs crossed, with your hands crossed behind your head. The end comes just at the right time. There are just no more ways to sit.

What is the purpose of this passage ( )

A．To give the writer’s opinion about long bus trips

B．To persuade you to take a long bus trip

C． To explain how bus trips and television shows differ

D．To describe the billboards along the road

乳牙期前牙反矫治目的为（）。

A.解除前牙反，促进上颌发育，抑制下颌过度发育

B.促进下颌发育

C.改变牙齿位置

D.建立适当的覆覆盖关系

E.抑制上颌发育

按照税法规定应当缴纳增值税的单位和个人在销售货物或者应税劳务时向购买方或接受劳务方开具的发票，称为（），它是计算和缴纳增值税的依据。

A、发票

B、信誉卡

C、收据

D、增值税发票

CF标志位，不但可以用来判断无符号数有无溢出，而且也可以判断带符号数有无溢出。