吸入麻醉药与哪种药物合用易引起第二气体效应（）。
A.乙醚
B.氧化亚氮
C.七氟烷
D.恩氟烷
E.异氟烷
参考答案：B
解析：只有氧化亚氮能吸入高浓度。
彩色多普勒技术中运用的三基色为（）。
A.红、黄、绿
B.蓝、红、绿
C.绿、蓝、黄
D.红、白、蓝
I would rather ________ to work after my graduation, but my fathe would rather I ________ abroad for further education.
A．to go ; go
B．go; went
C．went ; have gone
D．went ; will go
