易引起乳酸性酸中毒的口服降血糖药是
A．a葡萄糖苷酶抑制剂
B．磺脲类
C．双胍类
D．噻唑烷二酮类
E．苯甲酸衍生物
参考答案：C
—_______ do you read English newspapers?
—I read 21st Century every day. [ ]
A. How long
B. How often
C. How many
D. How much
什么叫代谢性酸中毒？可分为哪两大类？
