正常人血糖低于多少mg/dl肝脏开始动员糖原（）
A.60～70
B.70～80
C.80～90
D.100～120
E.120～140
参考答案：D
―It seems that you enjoy the hot pot a lot.
―Yes. I ________ living in Chongqing now.
A．used to
B．am used to
C．am used for
D．used for
以下描述两个磁极间的磁感线分布图中，正确的是 [ ]
A.
B.
C.
D.
