（三）TheNorthernLight根据以下材料回答下列问题：Thesunisstormyandhasitsownkindofweather.Iti

共享题干题 （三）The Northern Light 根据以下材料回答下列问题： The sun is stormy and has its own kind of weather. It is so hot and active that even the Sun's gravity cannot hold its atmosphere in check! Energy flows away from the Sun toward the Earth in a stream of electrified particles that move at speeds around a million miles per hour. These particles are called plasma, and the stream of plasma coming from the Sun is called the solar wind. The more active the Snn, the stronger the solar wind. The solar wind constantly streams toward the Earth, but don't worry because a protective magnetic fields surrounds our planet. The same magnetic field that makes your compass point north also steers the particles from the Sun to the north and south poles. The charged particles become trapped in magnetic belts around the Earth. When a large blast of solar wind crashes into the Earth's magnetic field first gets squeezed and then the magnetic field lines break and reconnect. The breaking and reconnecting of the magnetic field lines can cause atomic particles called electrons trapped in the belts to fall into the Earth's atmosphere at the poles. As the electrons fall into the Earth, they collide with gas molecules in the atmosphere, creating flashes of light in the sky. Each atmospheric gas glows a different color, Oxygen and nitrogen glows red and green and nitrogen glows violet-purple. As these various colors glow and dance in the night sky, they create the Northern Lights and the Southern Lights. Watching auroras ( 北极光 ) is fun and exciting, but normally you can only see them in places far north like Alaska and CanadA. The movement of the aurora across the sky is usually slow enough to easily follow with your eyes but they can also pulsate ( 跳动) , flicker (闪烁 ) , or even move like waves. During solar maximum, 5 auroras are seen as far south as Florida, even Mexico! Auroras often seem to be very close to the ground, but the lowest aurora is still about 100 kilometers above the ground, a distance much higher than clouds are formed or airplanes can fly. A typical aurora band can be thousands of kilometers long, a few hundred kilometers high, but only a few hundred meters thick. We hope you are able to travel to far-north places like the Arctic Circle and see the Northern Lights at least once during your lifetime. We know you will never forget it!1.[不定向选择题]What is the author's tone toward the Northern Lights?A.Indifferent B.Sarcastic C.Appreciative D.Sharp 2.[不定向选择题]The solar wind comes into being as a result of__________A.fast flow of energy away from the Sun B.disappearance of the Sun's gravity C.unpredictable weather of the Sun D.a stream of particles being blown away

1.参考答案：C
参考解析：文章第五段第一句话Watching auroras(北极光)is fun and exciting。观赏北极光是非常有趣令人兴奋的事情，因此作者对待北极光的态度是赞赏性的Appreciative。
2.参考答案：A
参考解析：文章第一段第三句话Energy flows away from the Sun toward the Earth in a stream of electrified particles that move at speeds around a million miles per hour。从太阳上发出向地球的以每小时100万英里的速度移动的带电粒子流能量流动。所以说太阳风形成的原因就是快速流动离开太阳的能力流。3.[不定向选择题]The Northern Lights are created when__________A.atomic particles fall to the Earth and collide with atmospheric gas molecule B.the magnetic field lines fail to reconnect C.the electrons falling to the Earth shine in different color D.oxygen and nitrogen are separated from the atmospheric gase

对的，就是这个意思