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【简答题】
有六个命题： ①如果函数y=f（x）满足f（a+x）=f（a-x），则y=f（x）图象关于x=a对称；②如果函数f（x）满足f（a+x）=f（a-x），则y=f（x）的图象关于x=0对称；③如果函数y=f（x）满足f（2a-x）=f（x），则y=f（x）的图象关于x=a对称；④函数y=f（x）与 f（2a-x）的图象关于x=a对称；⑤函数y=f（a-x）与y=f（a+x）的图象关于x=a对称；⑥函数y=f（a-x）与y=f（a+x）的图象关于x=0对称．则正确的命题是______（请将你认为正确的命题前的序号全部填入题后横线上，、填错均不得分）．
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举一反三
【简答题】Linux有() 版本和发行版本之分。
【单选题】A 3-year project requires an initial cash outlay of $10,000. During the operation, it can generate net cash inflow of $2000, $5,000 and $6,000 respectively in the following three years.Assume the cash...
A.
$506
B.
$454
C.
$818
D.
$630
【简答题】I. Calculation Company C has a contract to export 10 metric tons of Seafood, to be packed in cartons each of 40 lb. (1 lb = 0.45358kg), with a 5% more or less allowed both in quantity and in amount. 1...
【简答题】Linux 的主要发行版本有哪些 ?
【单选题】How can a company achieve differentiation?
A.
Competitive pricing.
B.
Functional design.
C.
Enhanced customer support.
D.
All of the above.
【简答题】Fill in the blanks with the expressions given below. Change the form where necessary. Each expression can be used only once. 1. I never really felt I ____ the company, although I had worked there for ...
【简答题】Linux的发行版有哪些?
【单选题】（Unit 9 Task 3）（10）You will hear 10 incomplete short dialogues. While listening, you are required to complete the dialogues by ticking the appropriate responses out of the four choices provided 10.
A.
It doesn't matter.
B.
No， I haven't.
C.
Go on.
D.
Maybe.
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