电子邮件地址的格式是（）。
A.用户名.主机域名
B.主机域名.用户名
C.用户名@主机域名
D.主机域名@用户名
参考答案：C
双速液压马达重载时使用轻载挡，下列现象中：Ⅰ.爬行现象、Ⅱ.工作压力过低、Ⅲ.安全阀开启、Ⅳ.转速过快，可能出现的是（）。
A．Ⅰ、Ⅱ
B．Ⅰ、Ⅲ
C．Ⅱ、Ⅳ
D．Ⅲ
填空题。
1. What was the _____ illness you have ever had. (bad)
2. Danny's father gets dressed _____. (quick)
3. The more you move your feet, the _____ you will be. (健康)
4. The more sugar you eat, the _____ you will be. (胖)
5. It's another way _____ TV. (说)
6. I am not feeling well. I don't know what to eat, _____.(也)
7. These _____ are not ripe enough to eat. (西红柿)
