问题
单项选择题
碳炭工具钢T7表示平均含碳（）
A.7%
B.0.7%
C.1.7%
D.以上都不是
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
碳炭工具钢T7表示平均含碳（）
A.7%
B.0.7%
C.1.7%
D.以上都不是
参考答案：B
| 完形填空。 | ||||
| Ten years later, I will be 23 years old. Our city will be a __1__ living place then. There will be many tall __2__ and trees. Many people will visit our __3__. Almost every family will have one or two cars. People will __4__ their cars to work every day. The libraries will have more computers, and people can __5__ books on them. The restaurants will have robot waiters (服务员) to __6__ you food. Schools will have more __7__ living in England to teach you English. With the __8__ of televisions and computers , transport will be fast (快的). You can only need two __9__ to get to Africa by plane. People will keep houses _10__ by using the solar energy (太阳能). In a word, the way people live will change a lot in the future. | ||||
|