下列哪一种药物在钠石灰中最不稳定
A．异氟醚
B．安氟醚
C．氧化亚氮
D．七氟醚
E．氟烷
参考答案：D
____ winter is still with us, and will be for a few more weeks, warm days may still be in the forecast for
your area. [ ]
A. As long as
B. Even though
C. Now that
D. Ever since
在代建制的克服“三超”现象的作用中，“三超”不包括( )。
A．超投资B．超规模C．超标准D．超污染
