咬肌间隙感染临床表现有()
A.张口受限
B.凹陷性水肿
C.可扪及波动感
D.疼痛
E.有压痛点
参考答案:A, B, D, E
To their deep sorrow, there was nothing left ______ the city except ruins after the violent earthquake, which turned the whole city into a silent world.
A.in
B.of
C.for
D.with
防御雷电电磁脉冲干扰的理想方法是什么?()
A.接地
B.采用屏蔽
C.避雷针
D.设备分布合理