电梯主要参数有（）。A、额度速度B、额度载重量C、提升高度D、层站数

My father_________ very busy this week. He _________free next week.

A．will be ; is

B．is ; is

C．will be ; will be

D．is ; will be

关于桩核冠桩的直径，正确的是

A．根径的1/2

B．根径的1/3

C．上前牙为2.5～2.8mm

D．下前牙为0.8～1mm

E．后牙为1.1～1.5mm

--- She's never spoken to a foreigner, _______?

--- Yes. She is active and can speak English freely.

A． is she

B．has she

C．isn't she

D．hasn't she

糖尿病肾病属于大血管病变。

（）是中国著名的“石雕之乡”，其石雕艺术的文化历史可追溯到1600多年前的晋代。

A.南安

B.永春

C.惠安

D.石狮