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Since the dawn of human history,the moon has influenced myth,religion,and poetry.But as the moon'sbright presence is over us in the sky,we wonder of its creation and existence.Lunar exploration and research in the 20th and 21st centuries have expanded our knowledge of our natural satellite and nearest neighborthe moon.
   The moon is so close (some 240,000 miles away) that,with the help of telescopes,it is easy to seemany details on the near side of the moon that is always facing the earth.The moon is airless because its gravity is too weak to capture and retain atmosphere;therefore,there is no weather--and no life.It is also waterless.The moon's dark plains,once believed to be stretches of water and still known as maria ("seas")are really vast flat basins,created by thick volcanic lava.The surface--despite the radiance(光輝)ofa full moon-is made up of dark grey rock that reflects only a tiny amount of the sunlight that hits it.
   Lunar exploration has stripped away some of the moon's mysteries.In 1959,the Soviet probe Luna 3 revealed the far side that is hidden from the earth's view.In 1969,Apollo II astronauts on the first manned flight to the moon brought back rock samples some 3,700 million years old --older than any rocks on earth.Samples from later missions indicate the moon may have been formed at about the same time as the rest of the solar system-4.6 billion years ago.
   Analysis of the moon rocks suggests an end of intensive meteor crash of the surface about 4 billion years ago and an end of volcanic eruption about a billion years ago.The moon appears cold and dead -- yet it still may be active.Observers report the flickering glow of what could be eruptions at the edges of the maria and in certain craters.

(1)What is true about the moon according to the passage?
D
D

A.There is no gravity on it.
B.There is no fresh water but some seas on it.
C.It's so close to the earth that all details about it can be seen.
D.Its surface can only reflect part of the light that the sun cast on it.
(2)What does the underlined phrase "stripped away" in paragraph 3 mean?
A
A

A.uncovered
B.stole
C.spread
D.explored
(3)Why is the moon believed to be active?
D
D

A.The moon reflects part of the sunlight.
B.There are lots of active craters on the moon.
C.Meteors cash the moon's surface constantly.
D.There still could be volcanic eruption on the moon.
(4)Which of the following is a suitable title for the text?
C
C

A.A Cold but Active Planet.
B.The Closest Natural Satellite.
C.Unlock the Mysteries of the Moon.
D.Make a Discovery of a New Planet.

【考點(diǎn)】說明文;宇宙探索
【答案】D;A;D;C
【解答】
【點(diǎn)評】
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發(fā)布:2024/4/20 14:35:0組卷:2引用:1難度:0.5
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