企业财务活动的环节中，( )是物业服务企业持续经营的前提条件。
A．资金运用
B．资金耗费
C．资金收回
D．资金分配
参考答案：C
The twins _____ TV at ten last night. [ ]
A. was watching
B. were watching
C. watched
D. were watch
下来化合物属于单萜的是（）
A.柠檬醛
B.薄荷醇
C.樟脑
D.龙脑
E.栀子苷
