_____ ill, I can't go to school today. [ ]
A. Because of
B. As
C. Being
D. With
答案:C
在低压电气设备中,与接触器相比,磁力启动器特有的功能是()。
A.漏电保护功能
B.连锁装置
C.可逆运行
D.热继电器保护
击出性骨折眶内组织"疝"入()
A.上颌窦
B.额窦
C.筛窦
D.蝶窦
E.海绵窦