题目内容
（请给出正确答案）
What is this text mainly about？
A．A research finding.
B．Choices of tourists.
C．Darwin's discovery.
D．Protection of the snow lotus.
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“What is this text mainly about？A．A research finding.B．Choices of tourists.C．Darwin's disco”相关的问题
What would be the best title for the text？
A．Priceless Knowledge
B．No Help
C．A Troublesome Machine
D．A Troublesome Day
听第9段材料，回答第15～17题。
Text 9
W: Please turn off the lights, Harry.
M: Why？ What's the matter？ I want to read the paper.
W: If we turn on too many lights, all the electricity in the house will go off.
M: Now who told you that？
W: Our new neighbor Mr. Smith.
M: Mr. Smith？ When did he come to our home？
W: I had to go to his home and ask for help today.
M: What was wrong？
W: When I turned on the washing machine, all the lights went out.
M: Well, did he take care of it for you？
W: Yes, but he said it would take a lot more work to do a really good job.
M: What does he mean by a really good job？
W: He said we need new electric wires throughout the house and a lot of other things.
M: Did he tell you how much it would cost？
W: Yes, about a thousand dollars.
M: A thousand dollars？ That's a lot of money. And just when we need to get some work done on our car, too.
What had gone wrong in their house？
A. Their washing machine.
B. The electricity.
C. The lights.
The text implies that
A．a man who is feeling high pressure is likely to get headache.
B．a man often with a low spirit is likely to be indigestible.
C．hysteria does harm to the lung.
D．the best way to treat a patient is keep him happy all the time.
A、1 mA
B、4 mA
C、1.33 mA
D、None of the above
For an n-channel depletion MOSFET,![For an n-channel depletion MOSFET, [图]= 8 mA and .](http://static.jiandati.com/b7c25a1-chaoxing2016-601767.png)
= 8 mA and![For an n-channel depletion MOSFET, [图]= 8 mA and .](http://static.jiandati.com/d2e09ea-chaoxing2016-601768.png)
= -6 V. If![For an n-channel depletion MOSFET, [图]= 8 mA and .](http://static.jiandati.com/b03be33-chaoxing2016-601769.png)
= 0.8 V, what is the value of the drain current,![For an n-channel depletion MOSFET, [图]= 8 mA and .](http://static.jiandati.com/7223067-chaoxing2016-601770.png)
？ （）
A、8 mA
B、10.25 μA
C、10.28 mA
D、6 mA
A.13.33 mA
B.1 mA
C.1.33 m
D.0 mA
By what date is it necessary to reply to the invitation？
A．2nd April.
B．2nd August.
C．22nd March.
D．4th May.
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