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有3个不同产品要在3台机床上加工,每个产品必须首先在机床1上加工,然后依次在机床2、3上加工。在每台机床上加

工3个产品的顺序应保持一致,假定用tij表示在第j机床上加工第i个产品的时间,试建立使3个产品总的加工周期为最短的数学规划模型。
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更多“有3个不同产品要在3台机床上加工,每个产品必须首先在机床1上加工,然后依次在机床2、3上加工。在每台机床上加”相关的问题

第1题

If there’s one man opinion matters more than any others’, it’s our manager()

A.A) whom

B.B) which

C.C) who

D.D) whose

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第2题

In the author's opinion, in order to make fake foning look real one has to______.A.talk ab

In the author's opinion, in order to make fake foning look real one has to______.

A.talk about interesting matters

B.behave politely to people passing by

C.hold the phone while walking

D.appear absorbed in conversation

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第3题

In the author's opinion, in order to make fake foning look real one has to______.A.talk ab

In the author's opinion, in order to make fake foning look real one has to______.

A.talk about interesting matters

B.behave politely to people passing by

C.hold the phone while walking

D.appear absorbed in conversation

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第4题

In Chaisinthop's opinion, when working in a big company, one can ______.A.get more experie

In Chaisinthop's opinion, when working in a big company, one can ______.

A.get more experience in more areas

B.become more skilled with hardware

C.come to know 50 to 60 people easily

D.have opportunities to do bigger projects

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第5题

Which statement about climbing, in the man's opinion, is NOT true?A.It is highly competiti

Which statement about climbing, in the man's opinion, is NOT true?

A.It is highly competitive.

B.It is a proof of one's endurance.

C.It is an understanding of oneself.

D.It is a contact with nature.

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第6题

[图] The specialist is _____.A、a man whose job is ...

The specialist is _____.

A、a man whose job is to train other people

B、a man who has been trained in more than one field

C、a man who can see the forest rather than the trees

D、a man whose concern is mainly technical or professional matters

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第7题

听力原文:W: Are you still working on the same genetics project?M: I've moved on to one abo

听力原文:W: Are you still working on the same genetics project?

M: I've moved on to one about plant genes.

Q: What can we infer from the conversation?

(19)

A.The man's major is genetics.

B.The man and woman are studying together.

C.The man sometimes works on more than one project at a time.

D.The man has completed one project and started another.

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第8题

What is the man's opinion of the language laboratory?A.It needs to have more French lesson

What is the man's opinion of the language laboratory?

A.It needs to have more French lesson tapes.

B.It needs to have its controls repaired.

C.It is different from all the other laboratories.

D.It can be operated rather easily.

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第9题

What is the man' s opinion of the language laboratory?A.It needs to have more French lesso

What is the man' s opinion of the language laboratory?

A.It needs to have more French lesson tapes.

B.It needs to have its controls repaired.

C.It is different from all the other laboratories.

D.It can be operated rather easily.

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