The second paragraph is mainly concerned with ____________. The purpose of the "special instruments" mentioned in the third par

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问题 The second paragraph is mainly concerned with ____________.
The purpose of the "special instruments" mentioned in the third paragraph_________.

选项 A、magnify the image of the sun
B、block out the sun’s intense light
C、measure the amount of energy emitted by the sun
D、photograph the sun

答案B

解析 从文章第三段最后一句:At any other time,the corona can be seen only when special instruments are used on cameras and telescopes to shot out glare of the sun’s rays.得知。故本题答案为B。
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