真菌败血症首选：（）
A.甲硝唑
B.两性霉素B
C.哌拉西林
D.青霉素（氨苄西林）＋氨基糖苷类 E 头孢他啶
参考答案：B
The （71） has several major components, including the system kernel, a memory management system, the file system manager, device drivers, and the system libraries.
A．application
B．information system
C．operating system
D．information processing
站线是指到发线、（）、牵出线、货物线及站内指定用途的其他线路。
A.安全线
B.机车走行线
C.调车线
D.禁溜线
