某粮库里有三堆袋装大米。已知第一堆有303袋大米，第二堆有全部大米袋数的五分之一，第

It’s possible to do many simple tricks with numbers. Here is one trick, if you follow the instructions, you will find it’s really interesting.

First, write down your house number. For example, if your address is 73 Jin Shang Road, you would write down 73. After you write down your house address number, you double it. Then add 5 to this doubled number. For example, if your address is 73 and you double it, you will get 146. Then you add 5, you will get 151.

And then, multiply this number by 50. In our example here, you’ll get 7550. The next step is to add your age to this total. For example, if you’re 16 years old, you should add 16 to this total. In our example here, the result will be 7566.

After that, you have to add the number of days in a year, which is 365. In our example here, 365 added to 7566 is 7931.

The final step is this: Subtract 615 from the number that you have. Take away 615 from the total. In our example, 7931 minus 615 is 7316.

The result here—7316—is the trick. The first part of the number is the address and the last part of the number is the age of the person. That is, 73 is the address that we started with, and 16 is the age that we used.

Isn’t it interesting? Do you want to have a try now?

小题1:How many steps are there in the trick?

A. Four                          B. Seven                    C. Nine

小题2:The third step is ______.     

A. ＋5                           B. ×50                          C.－615

小题3:Tom is 38, he lives in 89 Jin Shang Road. If he plays this trick, he will get______ in the end.

A. 3889                         B. 9150                          C. 8938

小题4:When you play this trick, ______ is Not the number you have to use every time.

A. 50                          B.73                        C. 365  

小题5:The best title of this passage is “______”.    

A. A trick with numbers          B. An interesting problem        C. How to work out a trick

运行生成树协议的端口处于（）状态时，才能转发数据包。

知识资本的实质是（）的总和

在以下称谓中，属于基督教专用的是（）。

A.阿訇

B.沙弥

C.主教

D.神父

安装在木龙骨上的纸面石膏板可以作为A级装修材料使用。（）