雏鸡10日龄前相对湿度(),10日龄后()。若湿度太低,使舍内过于干燥而增大粉尘,易诱发呼吸道疾病,若湿度过大,则机体呼吸困难,不利于机体排热,同时垫料过湿,易诱发球虫病
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教育政策分析的定性方法有()
A. 专家判断法
B. 因素法
C. 脚本写作法
D. 德尔菲法
Enterprise Router R1 connects an Enterprise to the Internet. R1 needs to create and advertise a default route into the Enterprise using EIGRP. The engineer creating the implementation plan has chosen to base this default route on the ip route command, rather than using i p default - network. Which of the following is not a useful step with this style of default route configuration?()
A. Create the default route on R1 using the ip route 0.0.0.0 0.0.0.0 outgoinginterface command.
B. Redistribute the statically configured defa ult route.
C. Disable auto - summary.
D. Configure the network 0.0.0.0 command.
Ensure R1 has no manually configured summary routes using the ip summary- address eigrp command.
垂直度是限制实际表面或轴线相对于基准表面或轴线的垂直程度。当给定一个方向时,公差带是距离为公差值,且垂直于基准平面或直线或轴线的()的区域。
A. 两个平行直线间
B. 两个平行平面间
C. 两个平行平面和平行直线间
D. 两个平行平面或平行直线间