每天为幼儿安排不少于2小时的户外活动，其中体育活动时间不少于1小时。
A. 正确
B. 错误
Which three statements describe user authentication in Cisco DCNM-LAN？ （）
A. Cisco DCNM-LAN server users are local to the Cisco DCNM-LAN server. Creating， changing， and removing Cisco DCNM-LAN server users has no effect on user accounts on managed devices.
B. A Cisco DCNM-LAN server user that has Administrator privileges can push out changes to managed devices even if the Cisco NX-OS role that is used on the discovered device has the network operator role.
Cisco DCNM-LAN user roles restrict the ability of users to make changes to Cisco DCNM-LAN server settings. Cisco NX-OS user roles enforce read/write privileges on the discovered devices.
D. Cisco DCNM-LAN allows you to configure unique credentials for each discovered device or use default credentials when you do not configure unique credentials for a device.
E. Cisco DCNM-LAN can use AAA servers to authenticate users. Only TACACS servers are supported.
切削中出现工作表面质量明显下降,异常振动或响声,这时刀具已磨损严重。
A. 正确
B. 错误
φ180作业区生产的钢管品种主要有管线管、液压支架管、（）、车桥管等。
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