Which statement about the Lightweight Access Point Protocol （LWAPP） protocol is true？（）
A. The processing of 802.11 data and management protocols and access point capabilities is distributed between a lightweight access point and a centralized WLAN controller.
B. LWAPP aggregates radio management forward information and sends it to a wireless LAN solution engine.
C. LWAPP authenticates all access points in the subnet and establishes a secure communication channel with each of them.
D. LWAPP advertises its WDS capability and participates in electing the best WDS device for the wireless LAN
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证券账户持有人也可以查询其账户的注册资料、证券余额、证券变更及其他相关内容。（）
A. 正确
B. 错误
五种社会形态划分法的根据主要是（）
A. 生产关系的不同性质
B. 社会主体的人的发展状况
C. 社会的阶级关系
D. 生产力发展水平
冷油器运行中需要保持水侧压力大于油侧压力，以保证当铜管泄漏时油不会漏入水内。（）
A. 正确
B. 错误
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