游客因低血糖晕厥时,要立即喂食含糖食物或饮料。( )
A. 对
B. 错
Current flow is represented by the letter symbol I.
A. 对
B. 错
One milliampere is equivalent to one-thousandth(0.001)of an ampere,and one microampere is equivalent to one-billionth(0.000 000 001)of an ampere.
A. 对
B. 错