常见的口服降糖药为（）
A.木丹颗料
B.二甲双胍
C.银杏叶片
D.胰岛素
参考答案：A, B
— It remains ______ whether Dave will be fit enough to play in the finals.
— Oh, no! Without him, we will lose the game. [ ]
A. seen
B. to be seen
C. seeing
D. to see
简单介绍超临界机组启动前水冲洗应具备条件和主要过程？
