下列吸入麻醉药与肾上腺素合用时易增加心肌应激性的是（）。
A.N2O
B.氟烷
C.安氟醚
D.异氟醚
E.七氟醚
参考答案：B
一个数除以8，商是5，余数是6，这个数是[ ]
A．46
B．38
C．53
I had just started back for the house to change my clothes _____I heard my name called. [ ]
A. as
B. for
C. while
D. when
