把两个一样的正方体拼成一个长方体后，体积和表面积都不变．______．
把两个一样的正方体拼成一个长方体后，体积不变但是表面积变了．
故判断为：错误．
句型转换。
1. Mr Smith plays soccer every day.(用now替换every day)
Mr Smith _____ _____ soccer now.
2. The reporter is talking with the actor.(就划线部分提问)
_____ is the reporter _____?
3. How is the weather in Ningbo?(改为同义句)
_____ is the weather _____ in Ningbo?
4. There are some teachers in the office.(改为一般疑问句)
_____ there_____ teachers in the office?
5. mother, is, my, home, look, at, cooking (连词成句)
________________________________________.
气焊的工艺参数主要包括（）。
A.接头形式的坡口形式
B.火焰能率
C.焊接方向
D.焊丝直径
