An 802.1x client cannot authenticate to an autonomous access point configured for multiple vlans. the native vlan does not have an ssid configured. Which one of the following links being down would prevent the clients from authenticating？（）
A. between the radius and the access point
B. between the client’s vlan and the wlse
C. between the native vlan and the wlse
D. between the client’s vlan and the radiu
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小麦红蜘蛛的防治药剂，下面不适用的是（）。
A. 乐果粉剂
B. 阿维菌素乳油
C. 氰氟草酯
D. 扫螨清
风力发电系统的发电过程是一个热能变换的过程。
A. 正确
B. 错误
《空调列车服务质量规范》中规定：销售无包装直接食用的食品时有（）措施，加盖洁净、消毒合格的苫布（盖），不徒手接触食品。
A. 防蝇、防尘
B. 防蝇、防虫
C. 防蚊、防尘
D. 防蟑、防尘
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