防止餐后血糖过快升高的药物
A．控制饮食，加强运动B．磺脲类和双胍类联合应用C．二甲双胍D．胰岛素E．α—糖苷酶抑制剂
参考答案：E
Mary has ______ speaking dialects, so it is not surprising to see her communicate with the people from
different parts of this country easily. [ ]
A. a gift for
B. trouble in
C. effects on
D. nothing to do with
用杂交玉米种子生产的玉米籽粒可供（）。
A.代代相传
B.不能用
C.下一代种子用
D.两代用
