某校课外小组测得柠檬汁的PH约为2，对该柠檬汁的酸碱性的判断正确的是[ ]
A、呈酸性
B、呈碱性
C、呈中性
D、无法判断
答案：A
The warm-hearted neighbor take care of the little girl when her parents were on business, and they appreciated it very much.
A．should
B．could
C．would
D．might
一台计算机的配置标有PIV—800，其中800代表( )。
A．CPU主频 B．计算机价格C．硬盘容量 D．以上均不对
