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  3. The Chinese fairy story Flying to the Moon now turns to be true, with China【

The Chinese fairy story Flying to the Moon now turns to be true, with China【

游客2023-07-14  52
问题     The Chinese fairy story Flying to the Moon now turns to be true, with China【C1】______the country’s second unmanned lunar probe, Chang’e 2 on 1st October, 2010. This mission marked another step for China’s pursuit of moon exploration. In fact, people all over the world have been and are【C2】______developing technologies for the exploration of deep space and the peaceful use of outer space, as space is actually a dangerous place, not only because of meteors (流 星) but also because of rays from the sun and other stars. The atmosphere again acts【C3】______our protective blanket on【C4】______. Light gets through, and this is essential【C5】______plants to make the food which we【C6】______. Heat,【C7】______, makes our environments tolerable and some ultraviolet rays (紫外线的) penetrate the【C8】______. Cosmic (宇宙的) rays of various kinds come【C9】______the air from outer space, but【C10】______quantities of radiation from the sun are screened off.【C11】______men leave the atmosphere they are【C12】______to this radiation; 【C13】______their spacesuits or the walls of their spacecraft, if they are inside, 【C14】______prevent a lot of radiation damage. Radiation is the greatest known danger to explorers in【C15】______. Doses of radiation are measured in【C16】______called "rents (雷目)". We all【C17】______radiation here on earth from the sun, from cosmic rays and from radioactive minerals. The "【C18】______" dose of radiation that we receive each year is about two millirems; it【C19】______according to where you live, and this is a very rough estimate. Scientists have reason to think that a man can【C20】______far more radiation than without being damaged; the figure of 60 rems has been agreed. [br] 【C15】
选项 A、earth
B、atmosphere
C、space
D、environment
答案 C
解析 句意理解。本句意为射线是探险者在太空遇见的已知的最大危险。由句中核心词汇radiation和explorers可推测，该空应填space。其他选项从搭配和语意上来说都不符合要求。
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