All the following is true except that（）.
A. in many places a counter current flows in opposition to the main current close to the bank
B. current can vary with depth of water and large deep draught ships can experience different current effects at differing parts of the hull tend to turn to the wind
C. as speed is reduced，the increased proportion of the ship's vector which is attributable to current will set the ship close to obstructions
D. when close to the berth in a head current，there is a danger that flow inshore of the ship becomes restricted and the ship is subject to interactive force
你是公司网络管理员。网络是一个单活动目录域环境。所有的服务器运行Windows Server 2003。你需要为6台在网络中高度可见的服务器使用WSUS服务进行紧急升级。你批准通过所有的升级。你要确保升级操作在1小时内完成。你该如何操作？（）
A. 在WSUS服务器上，打开命令提示符运行gpupdate/force命令
B. 在WSUS服务器上，打开命令提示符运行wuauclt/detectnow命令
C. 在这6台服务器上，打开命令提示符运行gpupdate/force命令
D. 在这6台服务器上，打开命令提示符运行wuauclt/detectnow命令
编程格式：S-，S后面的数字单位是（）。
A. mm/r
B. mm/min
C. r/min
D. m/mi
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