窗口服务人员接待用户时，一般要（），主动（），礼貌、热情、耐心、周到。
参考答案：站立；打招呼
If it were not for the fact that you _____ ill, I would ask you to do this right now.
A．were
B．had been
C．are
D．should be
分泌期宫内膜的厚度约为（）
A.5mm
B.2～3mm
C.10mm
D.8mm
E.3～4mm
