Shell不仅是用户命令的解释器,它同时也是一种功能强大的编程语言。
A. 对
B. 错
使用rm命令删除文件夹需要加上参数-r。
A. 对
B. 错
We hereby sincerely invite you and your company representatives to visitour______in SIAL China 2017.
A. exhibition
B. trade fair
C. display
D. booth
It would be a great______to meet you at the exhibition so that we can introduce our delicious and nutritious snack products to you.
A. please
B. pleasing
C. pleasure
D. pleased