一个同学的文具盒掉到地上，大家会不由自主地转头朝向他。这种注意是________注意。
参考答案：无意
—What were you doing when he ________“hello”to you?
—I _______in front of the blackboard.
A．was saying; read
B．was saying; was reading
C．said; read
D．said; was reading
消防无线通信器材有（）。
A、PDA
B、GPS
C、GIS
D、卫星通信系统
E、CPU
