I like watching basketball games __________ TV. [ ]
A. in
B. at
C. for
D. on
答案:D
近似数2.40万精确到( )位,有( )个有效数字,分别是( )
下述麻醉维持方法更适合缩窄性心包炎的是()
A.丙泊酚+异氟烷麻醉
B.异氟烷+氧化亚氮吸入
C.大剂量芬太尼麻醉
D.恩氟烷吸入
E.睡眠剂量吸入麻醉+小剂量芬太尼