A:Do you like stickers?
B:I have some stickers.
C:I like stickers.
电子计算器工作时的电流约为100mA,合 ____A,对人体的安全电压是 ____
While we _______ football in the classroom, the teacher came in.
在数轴上表示-4的点位于原点的____边,与原点的距离是____个单位长度.