题目内容

Force other than damaging winds are also at work inside tornadoes. Sometimes, as the turning, jumping funnel(漏斗) passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion(爆炸) is caused by the low air pressure at the center of a tornado.

The pressure at the center of a tornado is usually 13 pounds per square inch. However, inside the house the air pressure is normal, about 15 pounds per square inch. The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado funnel passes over a small building that measures 20 by 10 by 10 feet. On each square inch of the building, there is 2 pounds of pressure from the inside that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57,600 pounds. The pressure on the four walls adds up to 172,800 pounds.

If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and outside the building. But if the windows are shut tightly, the great inside pressure may cause the building to burst.

　　Unfortunately, heavy rain happens in thunderstorms that later produce tornadoes. So, people often shut all windows to protect their property. This may cause far worse damage later.

63. Which of the following is the main topic of the passage?

A. Where tornadoes are formed.  　　      B. When tornadoes usually occur.

C. How tornadoes can be prevented.　　     D. Why tornadoes cause so much damage.

64. According to the passage, tornadoes can destroy building because the _____.

A. force of a tornado increases the air pressure in a building

B. air pressure at the center of a tornado is over 172,000 pounds

C. weight of a tornado can crush a building’s roof when it passes overhead

D. air pressure inside a tornado is less than the air pressure inside a building

65. According to the passage, the pressure on a building during a tornado can be reduced　　　　by _____.

A. closing the windows 　　　　　        B. opening the windows

C. using an electric fan 　　　　          D. making the roof and walls stronger

63-65 DDB


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No more charging your smart phone every day...
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And a tiny Chinese company is to be the leader of it all.
It already counts Motorola, Nokia, and Samsung as customers for its advanced batteries.
But the real money is going to come when it starts selling electric cars.
Right now, the stock is trading at an extreme discount, offering in-the-know investors a chance to get in and make a killing.
You need to know all the details about this opportunity today — and not a day later.
To do that, and to gain access to all the information you'll need to invest confidently, simply sign up for the free e-Letter from Energy & Capital by entering your email address below...
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【小题1】What does the underlined part “make a killing” in Paragraph 7 mean?

A．Beat all other businesses.
B．Make a lot of money in a short time.
C．Force other batteries to withdraw from market.
D．Be the business leader in battery making.
【小题2】What is the possible problem with online subscribing?
A．The giving-away of privacy.
B．Getting lots of junk emails.
C．Becoming a member of some organization unwillingly.
D．Not being able to unsubscribe.
【小题3】Where is this material probably from?
A．A magazine.B．A newspaper.C．A website.D．A booklet.
【小题4】This passage is mainly to ______.
A．advertise new batteriesB．find potential investors
C．promote Energy & CapitalD．sell new technology

Force other than damaging winds are also at work inside tornadoes. Sometimes, as the turning, jumping funnel(漏斗) passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion(爆炸) is caused by the low air pressure at the center of a tornado.
The pressure at the center of a tornado is usually 13 pounds per square inch. However, inside the house the air pressure is normal, about 15 pounds per square inch. The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado funnel passes over a small building that measures 20 by 10 by 10 feet. On each square inch of the building, there is 2 pounds of pressure from the inside that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57,600 pounds. The pressure on the four walls adds up to 172,800 pounds.
If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and outside the building. But if the windows are shut tightly, the great inside pressure may cause the building to burst.
　　Unfortunately, heavy rain happens in thunderstorms that later produce tornadoes. So, people often shut all windows to protect their property. This may cause far worse damage later.
63. Which of the following is the main topic of the passage?
A. Where tornadoes are formed. 　　      B. When tornadoes usually occur.
C. How tornadoes can be prevented.　　     D. Why tornadoes cause so much damage.
64. According to the passage, tornadoes can destroy building because the _____.
A. force of a tornado increases the air pressure in a building
B. air pressure at the center of a tornado is over 172,000 pounds
C. weight of a tornado can crush a building’s roof when it passes overhead
D. air pressure inside a tornado is less than the air pressure inside a building
65. According to the passage, the pressure on a building during a tornado can be reduced　　　　by _____.
A. closing the windows 　　　　　        B. opening the windows
C. using an electric fan 　　　　          D. making the roof and walls stronger

 

In the next few years, battery technology is going to grow rapidly.

No more charging your smart phone every day...

No more “range anxiety” for electric cars, as new lithium batteries （锂电池）allow them to drive hundreds of miles on a single charge, just like a tank of gas.

And a tiny Chinese company is to be the leader of it all.

It already counts Motorola, Nokia, and Samsung as customers for its advanced batteries.

But the real money is going to come when it starts selling electric cars.

Right now, the stock is trading at an extreme discount, offering in-the-know investors a chance to get in and make a killing.

You need to know all the details about this opportunity today — and not a day later.

To do that, and to gain access to all the information you'll need to invest confidently, simply sign up for the free e-Letter from Energy & Capital by entering your email address below...

Once you do, we'll rush you our latest report, China's $2.00 Lithium Linchpin.

After getting your report, you'll begin receiving the Energy & Capital e-Letter, delivered to your inbox daily.

Become a member of Energy & Capital today. It is free and there is absolutely no obligation (责任), ever.

NO-JUNK: By no means will we EVER rent, sell or give away your email address for any reason. Unsubscribing from Energy & Capital is quick, easy, and painless... with just a few clicks. View our Privacy Policy.

1.What does the underlined part “make a killing” in Paragraph 7 mean?

A. Beat all other businesses.

B. Make a lot of money in a short time.

C. Force other batteries to withdraw from market.

D. Be the business leader in battery making.

2.What is the possible problem with online subscribing?

A. The giving-away of privacy.

B. Getting lots of junk emails.

C. Becoming a member of some organization unwillingly.

D. Not being able to unsubscribe.

3.Where is this material probably from?

A. A magazine.    B. A newspaper.        C. A website.        D. A booklet.

4.This passage is mainly to ______.

A. advertise new batteries             B. find potential investors

C. promote Energy & Capital       D. sell new technology

 

Force other than damaging winds are also at work inside tornadoes. Sometimes, as the turning, jumping funnel(漏斗) passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion(爆炸) is caused by the low air pressure at the center of a tornado.

The pressure at the center of a tornado is usually 13 pounds per square inch. However, inside the house the air pressure is normal, about 15 pounds per square inch. The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado funnel passes over a small building that measures 20 by 10 by 10 feet. On each square inch of the building, there is 2 pounds of pressure from the inside that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57,600 pounds. The pressure on the four walls adds up to 172,800 pounds.

If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and outside the building. But if the windows are shut tightly, the great inside pressure may cause the building to burst.

　　Unfortunately, heavy rain happens in thunderstorms that later produce tornadoes. So, people often shut all windows to protect their property. This may cause far worse damage later.

63. Which of the following is the main topic of the passage?

A. Where tornadoes are formed. 　　      B. When tornadoes usually occur.

C. How tornadoes can be prevented.　　     D. Why tornadoes cause so much damage.

64. According to the passage, tornadoes can destroy building because the _____.

A. force of a tornado increases the air pressure in a building

B. air pressure at the center of a tornado is over 172,000 pounds

C. weight of a tornado can crush a building’s roof when it passes overhead

D. air pressure inside a tornado is less than the air pressure inside a building

65. According to the passage, the pressure on a building during a tornado can be reduced　　　　by _____.

A. closing the windows 　　　　　        B. opening the windows

C. using an electric fan 　　　　          D. making the roof and walls stronger

 

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