单项选择题

某工程网络计划中，工作D有三项紧前工作，其最早开始时间分别是第18、22和26周，三项工作的持续时间分别是9、6和5周，则工作D的最早开始时间是第（）周。

A.26
B.27
C.28
D.31
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May 8th 200 _Dear Mr. Steele,We are writing in reply to your letter of April 5th, in which you asked for our advice concerning the marketing of motor-cycles in the western part of your country.At the moment, it would seem to us that it is not possible to give a definite answer about the prospects for such a plan. This is especially so, since there are such vast differences between the various places in that part of your country. It would appear to us that your best course would be to conduct an area sales survey.In addition to a survey, we would also advise you to make a personal visit to those places. This would enable you to 'get the feel' of the places concerned, which is vital for any businessman planning a major marketing venturE.We look forward to hearing from you again in the near futurE.Yours sincerely,C.Brown______.A.complaint.B.advicE.C.application.D.request.
A.At
B.
In
C.
We
D.
Yours
E.
A.complaint.
B.advicE.
C.application.
单项选择题
关于项目总投资中的流动资金的说法，正确的是（）。
A.流动资金估算一般应采用扩大指标法
B.项目总投资中的流动资金是指投产后形成的流动资产
C.与固定资产一样，流动资产投资应该通过折旧方式收回
D.在项目计算期末应收回全部流动资金
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