What is the primary use of a remote access VPN?（）
A. to secure communication between two remote PCs
B. to secure communication between two remote offices
C. to secure communication betweenan remote PC and the corporate intranet
D. to secure communication between a corporate intranet and the public internet
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【剪切】菜单命令的快捷键是（）。
A. Ctrl＋C
B. Ctrl＋X
Ctrl＋V
D. Ctrl＋Z
（）是指随机抽样调查中样本指标与总体指标之间的差异。
A. 抽样错误
B. 类型差异
C. 抽样误差
D. 抽样估计
企业用现金购买将于3个月内到期的国库券，是现金流出，构成现金流量。
A. 正确
B. 错误
Why will a two stage flash type distilling plant tend to operate more efficiently when operating in cold seawater?（）
A. The colder seawater passing through the condenser tube bundles of the various stages increases evaporator vacuum
B. The amount of heated feed water discharged from the feed water heater after cndenser is increased
C. Fewer non-condensable gases are created by the flow of colder seawater
D. More seawater is allowed to pass through the flint stage overflow weir
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