()以投切熔件的方法对(干线或分支线)进行送(停)电操作。
A.不准
B.不得
C.严禁
D.不应该
参考答案:C
Bob insisted that he____ nothing wrong and ____ from work. [ ]
A. did; won't be fired
B. had done; not be fired
C. should do; mustn't be fired
D. do; shouldn't be fired
牙拔除中最常见的并发症()
A.牙槽骨骨折
B.牙龈撕裂
C.牙折断
D.邻牙或对颌牙损伤
E.颞下颌关节脱位