冬期抹灰施工中，掺有水泥的抹灰砂浆用水，水温不得超过80℃，砂的温度不宜超过40℃。( )
参考答案：对
I’ll spend my holiday in Qinghai, _____ lies in the north of China.
A．who
B．which
C．where
D．that
语言变项与语言变式语
