触电者未脱离电源前,救护人员不准直接用手触及伤员。
参考答案:对
--- Whose schoolbags are they ? --- They`re .
A.Jim`s and Tom`s
B.Jim and Tom`s
C.Jim`s and Tom
D.Jim and Tom
要把一张照片输入计算机,可能用到()
A.打印机
B.扫描仪
C.绘图仪
D.音箱