格列本脲具有哪些结构特点（）
A.含磺酰脲结构
B.含酰胺键
C.有甲苯基
D.含吡嗪环
E.环己氨基
参考答案：A, B, E
A: You look very nice in your new dress today.
B: Oh, really? I _________ it when it was on sale.
A．buy
B．bought
C．have bought
D．will buy
麻醉前用药的注意事项有哪些？
