分析小屋安全检测报警系统不能正常工作的原因是()。
A、可燃气体检测元件失效
B、PLC系统故障
C、警笛故障
D、以上均有可能
参考答案:D
Philip likes to play football. He often plays football after school with his friends. Sandy likes to play basketball. She teaches her friends how to play it every Sunday afternoon. Han Mei is very good at the computer. She always uses it to draw pictures three times a week, and she uses it to surf the Internet. She has a good friend in America. Her name is Mary. Lin Tao is also good at drawing pictures. But he never uses computer to draw.
小题1:What do Sandy and his friends do on Sunday afternoon?
A.Play football
B.Play basketball
C.Draw pictures
D.Play computer games小题2:How often does Han Mei draw with computer?
A.Once a week
B.Three times a week.
C.Once a day
D.Every day小题3:Who likes to surf the Internet?
A.Philip
B.Sandy
C.Han Mei
D.LinTao小题4:How often does Lin Tao use computer to draw?
A.Never
B.Hardly ever
C.Three times a week
D.Every week小题5:Who's Mary?
A.She's an English girl.
B.She's Sandy's friend.
C.She's Han Mei's friend.
D.She's Lin Tao's classmate.
试论诸葛亮。