寒热真假形成的病机是（）
A.阴阳偏胜
B.阴阳偏衰
C.阴阳互损
D.阴阳格拒
参考答案：D
地下室、水池、水塔、储液罐等需要做防水层的部位，常采用掺防水剂或防水粉的防水砂浆。( )
The most important ______ of the farmers in Iraq is dates, of which Iraq is the world's leading exporter.
A．economic crop
B．cash crop
C．money crop
D．staple
