隔爆型电气设备之所以能够隔爆,关键是它有一个特制的()。
A. 隔爆外壳
B. 隔爆结构
C. 内外隔爆系统
D. 隔爆开关
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A Cisco Aironet Wireless LAN Adapter CB21AG is inserted into a user’s PC cardbus slot. Both the green status LED and the amber activity LED are blinking slowly. What is the condition of the adapter? ()
A. The adapter is scanning for the wireless network for which it is configured.
B. The adapter is in power save mode.
C. The adapter is transmitting or receiving data while associated to an access point or another client.
D. The adapter is not receiving power.
E. The adapter is associated to an access point or another client.
F. None of the other alternatives apply
单管振动式液体密度汁无须被测液体从管内流过,就可测量密度。
A. 正确
B. 错误