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【单选题】
设函数f（x）= 2 x +lnx 则 （ ）A.
x= 1 2 为f（x）的极大值点
B.
x= 1 2 为f（x）的极小值点
C.
x=2为 f（x）的极大值点
D.
x=2为 f（x）的极小值点
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举一反三
【单选题】Which of the following is not the preparation that the interviewee should make before the phone interview?
A.
Do some background research on the company and the position
B.
Prepare some paperwork, including your resume, the job description, research on the company, your prepared questions for them and some may-be-asked questions and answers
C.
Have a pen and paper handy for note-taking
D.
Wear proper makeup.
【单选题】One disadvantage of reusing treated wastewater is .
A.
its cost is too high
B.
its productivity is too low
C.
the resulting water is not ultra-pure
D.
the method is not logical
【单选题】下列反应都有水参加，其中属于氧化还原反应，而水既不做氧化剂，又不做还原剂的是（ ）
A.
2F 2 +2H 2 O=4HF+O 2 ↑
B.
2Na+2H 2 O=2NaOH+H 2 ↑
C.
C1 2 +H 2 O=HC1O+HC1
D.
C+H 2 O 高温 . CO+H 2
【简答题】disposal of wastewater
【简答题】根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两 项为多余选项。 Handwriting can make or break the first impression . If your handwriting is difficult for others to read, you will sometimes feel embarrassed._51___. It need...
【简答题】disposal of wastewater
【单选题】Section A Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoke...
A.
Nor do I.
B.
I've just bought a new one.
C.
Yes, of course.
D.
No, you needn't.
【单选题】下列反应都有水参加，其中属于氧化还原反应，而水既不做氧化剂，又不做还原剂的是
A.
2F 2 +2H 2 O=4HF+O 2
B.
2Na+2H 2 O=2NaOH+H 2 ↑
C.
C1 2 +H 2 O=HC1O+HC1
D.
C+H 2 O CO+H 2
【简答题】Wastewater chemical treatment
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