题目内容

听力原文：M. Peter began to swim in 1980 and he joined a swimming club in 1982.
W: Yes, I know. He set a new world record in 1997.
When did Peter set the world record？

A. In 1998.
B. In 1997.
C. In 1992.

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有三个相互独立的投资方案甲、乙、丙，所有方案寿命均为10年，残值为0，基准收益率10%，可利用资本为18万元，项目有关数据见表3-2。
则最优方案组合为()。

A. 甲+乙+丙
B. 乙+丙
C. 甲+丙
D. 甲+乙

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某工程双代号时标网络如下图所示，下列选项正确的是()。

A. 工作A的LF为3
B. 工作C的TF为1
C. 工作E的TF为2
D. 工作G的FF为3

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如下图所示双代号网络图中的()。

A. 虚工作2—3是多余的
B. 虚工作4—5是多余的
C. 所有虚工作均为必要的
D. 虚工作5—6是多余的

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We can draw a conclusion from the text that the overall U.S. economy ______.

A. must guard against foreigners selling their steel at shocking prices.
B. had difficulty in sustaining development in face of foreign competitors.
C. can benefit enormously from the lower prices of steel in world markets.
D. took advantage of the government's protection to enhance efficiency.

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听力原文：M. Peter began to swim in 1980 and he joined a swimming club in 1982.W: Yes, I know. He set a new world record in 1997.When did Peter set the world record？

A. In 1998. B. In 1997. C. In 1992.

有三个相互独立的投资方案甲、乙、丙，所有方案寿命均为10年，残值为0，基准收益率10%，可利用资本为18万元，项目有关数据见表3-2。则最优方案组合为()。

某工程双代号时标网络如下图所示，下列选项正确的是()。

如下图所示双代号网络图中的()。

We can draw a conclusion from the text that the overall U.S. economy ______.

听力原文：M. Peter began to swim in 1980 and he joined a swimming club in 1982.
W: Yes, I know. He set a new world record in 1997.
When did Peter set the world record？

A. In 1998.
B. In 1997.
C. In 1992.

有三个相互独立的投资方案甲、乙、丙，所有方案寿命均为10年，残值为0，基准收益率10%，可利用资本为18万元，项目有关数据见表3-2。
则最优方案组合为()。