一般情况下红色警告标牌的去除由谁执行？（）
A.车间主管
B.车间领班
C.飞机维修技术员
D.挂牌人
参考答案：D
By the time you have completed the essential training, you ________ exposed to virtually every new feature of the course . [ ]
A. will have been
B. are
C. have been
D. will be
与链霉素和对氨基水杨酸钠合用可延缓细菌耐药性产生（）
A．异烟肼
B．亚胺培南
C．沙丁胺醇
D．阿莫西林
E．氨苯蝶啶
