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发表于 2013-12-18 07:34:28
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本帖最后由 caro 于 2013-12-18 07:41 编辑
The 2012 London Olympics had enough problems to worry about.
But one more has just been added - a communications blackout caused
by solar storms. After a period of calm within the Sun, scientists have detected the
signs of a flesh cycle of sunspots that could peak in 2012, just in time for
the arrival of the Olympic torch in London.
Now scientists believe that this peak could result in vast solar
explosions that could throw billions of tons of charged matter towards the
Earth, causing strong solar storms that could jam the telecommunications
satellites and interact links sending five Olympic broadcast from London.
"The Sun's activity has a strong influence on the Earth. The
Olympics could be in the middle of the next solar maximum which could
affect the functions of communications satellites," said Professor Richard
Harrison, head of space physics at the Rutherford Appleton Laboratory in
Oxfordshire. At the peak of the cycle, violent outbursts called coronal mass
ejections (日冕物质抛射) occur in the Sun's atmosphere, throwing out
great quantities of electrically-charged matter. " A coronal mass ejection
can carry a billion tons of solar material into space at over a million
kilometres per hour. Such events can expose astronauts to a deadly
amount, can disable satellites, cause power failures on Earth and disturb
communications," Professor Harrison added. The risk is greatest during a
solar maximum when there is the greatest number of sunspots.
Next week in America, NASA is scheduled to launch a satellite for
monitoring solar activity called the Solar Dynamics Observatory (SDO),
which will take images of the Sun that are 10 times clearer than the most
advanced televisions available. The Rutherford Appleton Laboratory helped to make the high-tech
cameras that will capture images of the solar flares (太阳耀斑) and explosions as they occur.
Professor Richard Hold away, the lab's director, said that the SDO
should be able to provide early warning of a solar flare or explosion big
enough to affect satellite communications on Earth "If we have advance
warning, we'll be able to reduce the damage. What you don't want is
things switching off for a week with no idea of what's caused the
problem," he said.
72. The phrase "communications blackout" in paragraph 1 most probably
refers to during the 2012 Olympics.
A. the extinguishing of the Olympic torch
B. the collapse of broadcasting systems
C. the transportation breakdown in London
D. the destruction of weather satellites
73. What can be inferred about the solar activity described in the
passage?
A. The most fatal matter from the corona falls onto Earth.
B. The solar storm peak occurs in the middle of each cycle.
C. It takes several seconds for the charged matter to reach Earth.
D. The number of sunspots declines after coronal mass ejections.
74. According to the passage, NASA will launch a satellite to _________.
A. take images of the solar system
B. provide early warning of thunderstorms
C. keep track of solar activities
D. improve the communications on Earth
75. Which of the following might be the best title of the passage?
A. Solar Storms: An Invisible Killer
B. Solar Storms: Earth Environment in Danger
C. Solar Storms: Threatening the Human Race
D. Solar Storms: Human Activities to Be Troubled |
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发表于 2013-12-17 10:07:39
昨晚十一点半数理化弄完眼睛已经疼得受不了啦
英语卷又是我做的，楼上贴的是最后一道阅读题，我、我、我要疯啦，只好瞎蒙
女儿拉拉我轻声说“等下一辆吧”声音里透着无奈，，，又N分钟 之后第三辆车停下，妮妮上车、是唯一的乘客、在我的目送下车子渐渐远去，此时天还没亮
发表于 2013-12-18 10:31:38
刚考完一次物理，及格的共3人，妮妮同学就是那个第三名68分
另外俩男生76、91，郁闷得妮妮准备把物理课代表、组长啥的都辞了
妮妮及格了尚且如此，那些更用功、所有时间都在补课的孩子拿着30上下的分数是什么心情？还有动力学吗？成天出这种题的人脑子进屎了么
我们这儿一般都是一个半月左右啊，俺上学那会儿就如此啊！1月中到2月底。
妮妮一直从学校 走了4、5站过来，见此人头攒动的盛况我们俩只好落荒而逃
观点。
，数理化重复的、会做的就应该跳过、有那功夫用在英语上，，，问题是我说了不算