移动业务交换中心的英文缩写是()
A.MSC
B.HLR
C.BSC
D.BTS
参考答案:A
This kind of milk well this year. It________ out soon.
A.sells; will be sold
B.sells ; is sold
C.is sold; will be sold
D.is sold; sells
下列哪一项是塑料暂时冠不具备的作用()
A.便于清洁
B.保持修复间隙
C.保持美观
D.保护牙髓
E.避免刺激