使用文件前必须先 ( )
A.建立文件
B.打开文件
C.撤销文件
D.读文件
参考答案:B
连词成句。
1. does, how, play, Steven, often
2. hot, day, what, sunny, a
3. radio, music, why, Chinese, is, playing, the
4. in, you, what, do, winter, do, like, to
5. play, I, to, snow, want, the, in
如遇多种客人说不舒服食物中毒该如何处理?