我国微型计算机上采用的汉字编码标准是（）。
A．ASCII
B．GB2312-80
C．BIG-5
D．BCD
参考答案：B
Mike is only 15 years old. He is not _______ to get a driver's license. [ ]
A. old enough
B. enough old
C. young enough
D. enough young
怎样用电压表测量电压、用电流表测量电流？
