简述造成钻出的孔径大于或小于规定尺寸的原因及如何防止？
查看答案
槽式给矿机适用于中等粒度物料的给矿，最大粒度可达（）。
按规定对房产租金收入要计算房产税，其适用的税率是（）。
A. 1.2%
B. 12%
C. 10%
D. 20%
周期来压的主要表现形式是：煤层顶板（）有时还可能引起煤壁片帮、支柱折损、煤层顶板发生台阶下沉等现象。
A. 下沉速度急剧增加
B. 下沉量变大
C. 支柱所受载荷普遍增加
You are designing a security strategy for the infrastructure servers at the resorts.Which two actions should you perform？（Each correct answer presents part of the solution. Choose two）（）
A. Place all infrastructure servers in subnets that cannot exchange information with the Internet
B. Establish a custom security template that contains unique required settings for each combination of services that run on the infrastructure servers
C. Use Group Policy objects （GPOs） to apply the custom security template or templates to the Infrastructure servers
D. Edit the local policy settings to configure each individual server
微信支付 
支付宝支付