阅读理解。
Creativity is the ability to create inventions,solve problems or create a work of art using
an unusual or innovative(革新的)approach.Creativity is also a skill in high demand in business
and in many other forms of employment.All progress is the result of some sort of creative
act.Thus someone who can produce such acts on a consistent basis is a valuable addition
to any undertaking.
Research has shown that too much passive media consumption at a young age prevents
the development of creativity.You might think that creativity is a result of high intelligence,
but that is not the case.Sure,it does not hurt to be smart,but you can be a smart robot
without being able to imagine new ways of doing things.On the other hand it's common
knowledge that traveling increases your ability to think"outside the box",because you
experience a lot of new things and different ways of doing things when you witness how
people from other cultures live.
So what is the difference between surfing the web and watching TV and traveling?
Watching TV is very passive and your brain simply discards most of it.And it is as if it
has become cluttered(凌乱的)with useless information that it cannot really process.
When you are doing things actively,by being there,by having a heightened sense of
alert,very positive things happen.For example,remember your last trip.Let's say you've
been to Tokyo.For most nonJapanese the experience of being in the city is very impressive.
Everything is huge.There are lots of people and technology is everywhere.Because the city
is new for you,your brain switches in"possibly dangerous"mode.You notice much more,
even tiny details.
Now that your mind is open it also stores the information better,because of your aroused
state.All your input is stored with stronger emotions and is thus easier to recall later.That's
why you should travel or simply go to new places in your town.Actively observe how you
feel and then try to reproduce the feeling at a familiar place.This way you will learn to see
things with the eyes of a traveler.
1．What do we know from Paragraph 1?
A．Creativity is an important characteristic for business people.
B．Creativity is used just to create inventions or solve problems.
C．A creative personality is only useful in art.
D．Creativity isn't necessarily important for all people.
2．What can be inferred about creativity from the passage?
A．It belongs to people with great intelligence.
B．Experiencing new things is helpful for you to develop it.
C．It means people know about others who live in different cultures.
D．It is like a clever robot that can do many things.
3．Which of the following words in the passage has the opposite meaning to the underlined word "discards" in Paragraph 3?
A．Prevents
B．Increases.
C．Switches.
D．Stores.
4．An example of a trip to Tokyo is given in Paragraph 4 to show that________.
A．the Japanese are one of the intelligent peoples
B．traveling is positive but sometimes dangerous
C．positive things happen while people are traveling abroad
D．most nonJapanese are curious about Tokyo
5．Which of the following statements does the author agree with?
A．Traveling abroad is the only way to enrich people's knowledge.
B．Traveling is likely to arouse people's creativity.
C．Surfing the web is good for developing creativity.
D．Watching TV is an active way of gaining information.
=300的光滑斜面上，A与B间的动摩擦因数为
，现有一平行于斜面向下的力F作用在物体B上，设最大静摩擦力等于滑动摩擦力，若要使物体运动，则F至少为（
）（ ）
，分析B受力如图，B受到自身重力，A的压力和A对B 的摩擦力，要把B向下滑动，那么拉力F至少为
，对照答案B对。