This is to inform you that we are acting as agents ______ a sole agency commission basis.

第1题

国内航线机场建设费的代码为（）。

A.CY

B.CN

C.YO

D.YQ

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第2题

设f（x，y)与ψ（x，y)均为可微函数，且ψˊy（x，y)≠0，已知（xo，yo)是f（x，y)在约束条件ψ（x，y)＝0下的一个极

设f(x，y)与ψ(x，y)均为可微函数，且ψˊy(x，y)≠0，已知(xo，yo)是f(x，y)在约束条件ψ(x，y)＝0下的一个极值点，下列选项正确的是()

A．若fˊx(xo，yo)＝0则fˊy(xo，yo)＝0

B．若fˊx(xo，yo)＝0则fˊy(xo，yo)＝0

C．若fˊx(xo，yo)≠0则fˊy(xo，yo)≠0

D．若fˊx(xo，yo)≠0则fˊy(xo，yo)≠0

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第3题

在电力系统中，通常110kV、220kV（中性点直接接地系统）的接线方式采用（）接线。

A.Y0/YO

B.Y/Y

C.V/V

D.YO/Y

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第4题

6一10／0.4KV三相四线制系统中，电力变压器其联结组别有（)。

A.YO/Y-12

B.Y/Yo-12

C.Yo/A一11

D.△/Yo-11

E.△/Yo—12

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第5题

We know you care _____ your home and family, so you always spend a lot of time with yo

A.about

B.for

C.of

D.with

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第6题

告诉；通知（）

A.increase

B.inform

C.influence

D.interrupt

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第7题

I regret ______ （inform)you that you are dismissed．

I regret ______ (inform)you that you are dismissed．

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第8题

增大车刀前角yo，会使（)

A.刀刃强度增大

B.切削力减小

C.切削力不变

D.切削力增大

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第9题

A long period of illness in which you are unable to do any sport is likely to make yo

A.competitive

B.depressed

C.logical

D.critical

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第10题

The president promised to keep all the board members ______ of the negotiations.（inform)

The president promised to keep all the board members ______ of the negotiations.(inform)

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