物业管理的策划阶段,建设单位应与选聘的物业服务企业签订《物业服务合同》。()
参考答案:错
What __________ Amy does and many people are thankful to her.
A.a important job
B.an important work
C.a important work
D.an important job
局部通风机的“三专”是指:专用变压器、专用开关和()。