题目内容

在该网络计划中，确定其计划工期的正确方法为（）。

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根据背景材料，作答 46～47 题。
背景材料：
某省经过国家有关部门批准，拟建一年产量为50万t乙烯的石油冶炼项目。该项目通过公开招标的方式最终确定天翔工程总承包公司负责完成该项目的设计、采购和施工等任务。经过谈判，天翔工程总承包公司与项目业主签订了工程项目总承包合同，并在合同中明确了合同计价方式。
第 46 题该项目所采用的工程项目承包模式在国际上通常被称作（）。

场景
某工程双代号网络计划如下图所示，已知计划工期等于计算工期(单位：天)。
根据场景，回答下列 21～25 问题。
第 21 题上述网络计划工期Tc为（）天。

Section A
Directions: In this section, there are 10 incomplete sentences. You are required to complete each one by deciding on the most appropriate word or words from the 4 choices marked A , B, C, and D.
Criticism and self-criticism is necessary ______ it helps us to find and correct our mistakes.

A. for that
B. at that
C. with that
D. in that

听力原文：Clerk: Can I help you？
Jean: Yes, I'm looking for a pair of white gloves. I think I wear Size Six.
Clark: The gloves are on this counter. Let's see. How about the blue one？ The color is becoming to you and they are washable, too.
Jean: Oh, I'H try them on. They seem to fit. How much shall I pay you？
Clerk: They are on special this week. They've been reduced to five dollars.
Jean: All right. I'll take them.
Clerk: That'll be five-twenty with the tax.
8. What color gloves does the customer buy？
(13)

A pair of blue gloves,
B. A pair of white gloves.
C. A pair of black gloves.
D. A pair of green gloves.