（）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
法国著名思想家（）说过：“我不同意你说得每一句话，但是我誓死捍卫你说话的权力。”
A. 伏尔泰
B. 卢梭
C. 罗曼罗兰
D. 德加莫兰
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