工作面倾角大于（）°时，必须有防止煤矸窜出刮板输送机伤人的措施。
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女性，43岁，头痛发热5天。CT平扫显示低密度病灶强化，脑室扩大。诊断
A. 结核性脑膜炎
B. 化脓性脑膜炎
C. 脑膜型脑囊虫病
D. 病毒性脑膜脑炎
E. 细菌性脑膜炎
Which of the following can either directly or indirec tly identify all the interfaces for which both 1) OSPF has been enabled and 2) OSPF is not passive?（）
A. show ip ospf database
B. show ip ospf interface brief
C. show ip protocols
D. show ip route ospf
E. show ip ospf neighbor
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