双胍类药物常见的副作用为（）
A.乳酸性酸中毒
B.低血糖
C.胃肠道反应
D.过敏性皮疹
E.肝功障碍
参考答案：C
Some problems ___ in the lecture by Mr.Smith are very popular in our school, such as the waste of electricity, water and food, etc...
A．referring
B．referred to
C．referring to
D．were referred
下列哪项不属于病理反射（）
A.Gonda征
B.Hoffmann征
C.Babinski征
D.Chaddock征
E.Oppenheim征
