在工程双代号网络计划中，某项工作的最早完成时间是指其( )。

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问题单项选择题

A．完成节点的最迟时间与工作自由时差之差
B．开始节点的最早时间与工作自由时差之和
C．完成节点的最迟时间与工作总时差之差
D．开始节点的最早时间与工作总时差之和

答案

参考答案：C

单项选择题 A1/A2型题

关于普查的目的，以下哪项不正确（）。

A.早期发现病例

B.了解人群的健康水平

C.了解疾病的分布

D.为健康决策提供依据

E.验证病因假设

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单项选择题

Air France SA said Monday that its second-quarter net profit fell 35 percent to €57 million ($57.4 million), but sales were steady and operating profit surged.Earnings before interest and tax, a measure of operating income, gained 86 percent to €141 million as fuel costs fell and cargo traffic rose. Air France has been hurt less than rivals such as British Airways PLC and Lufthansa AG by the slowdown on North Atlantic routes following the war on Iraq in 2003 because it has fewer flights in that market.Net income fell as the airline paid deferred taxes that came due. Sales rose 0.9 percent to €3.2 billion. The carrier lost about €80 million in revenue because of a four-day strike by pilots in September. An accord was reached tying future pay increases to inflation. The carrier said that first-half fuel costs fell 15 percent to €680 million. Cargo traffic rose 11 percent in the second quarter, while passenger traffic rose 1.1 percent. The airline’’s shares gained 87 cents, or 7.7 percent, to close at €12.11.Separately, Air France and Alitalia SpA agreed to buy 2 percent stakes in each other as Europe’’s second- and sixth-largest airlines deepen their partnership.

€ in "€57 million" and "€141 million" probably stands for________.

A．English

B．the euro

C．European

D．European Currency Unit

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