2. 外语
  3. A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in【C1】______at the Sun’s ver

A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in【C1】______at the Sun’s ver

admin2010-07-24  59
问题     A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in【C1】______at the Sun’s very center. It is here that is to be found the【C2】______of the energy that the Sun pours out into space is【C3】______The energy takes the form of light and heat. This energy is【C4】______at the center of the Sun as billions【C5】______billions of nuclei of hydrogen atoms【C6】______with each other and fuse together to form nuclei of helium, and in doing so,【C7】______some of the energy that is【C8】______in the nuclei of atoms. The【C9】______of light and heat of the Sun【C10】______that some 600 million tons of hydrogen be【C11】______into helium(氦)in the Sun every second. This the Sun has been doing for several thousands of millions of years. The nuclear energy is released at the Sun’s center as high-energy gamma radiation,【C12】______of electromagnetic radiation like light and radio waves, only of very much shorter【C13】______. This gamma radiation is absorbed by atoms inside the Sun to be【C14】______at slightly longer  wavelengths. This radiation, in its【C15】______is absorbed and reemitted. As the energy filters through the【C16】______of the solar interior, it passes through the X-ray part of the spectrum【C17】______becoming light. At this stage, it has reached what we call the solar surface, and can escape into space without being absorbed further by solar atoms. A very small【C18】______of the Sun’s light and heat is emitted in such directions that【C19】______passing  unhindered through interplanetary space, it【C20】______the Earth.
【C6】
选项 A、deal
B、collide
C、meet
D、charge
答案B
解析 动词辨义题。hydrogen atoms ... with each other and fuse together to form nuclei of helium. 该句是对氢原子核生成氦的具体描述。氢原子核在怎样后。才能通过融合聚变成氦。可推测，氢原子核只有在首先相碰撞后，才能融合。故选择collide“碰撞”。deal with意为“处理”；meet意为“遇见，碰见”，表达不出相互撞击，相互接触的意思；be charged with是固定搭配，意为“被指控……”，与原文无关，可排除。
转载请注明原文地址:https://kaotiyun.com/show/NdN7777K
0

大学英语四级

相关试题推荐
随机试题
最新回复(0)