2. 职称英语
  3. A. attempt B. charged C. crucial D. delicate E. essentially F. eventually

A. attempt B. charged C. crucial D. delicate E. essentially F. eventually

游客2024-09-04  52
问题    A. attempt B. charged C. crucial D. delicate E. essentially
   F. eventually G. expended H. fraction I. individual J. maintain
   K. minority L. negligible M. scrapping N. slashing O. upsurging
   Space X launched a cheaper, partially-used rocket into orbit. That’s a stride toward 【C1】______the price tag of sending payload to space. Successfully flying reusable rockets is a 【C2】______step toward the dream of sending people to Mars. Until now, rockets have almost all been single-use. Once the fuel is【C3】______, a rocket stage plummets to Earth, resulting in the destruction of extremely expensive equipment that costs tens of millions of dollars to build.
   Its founder has likened that to 【C4】______a 747 jet after one flight, which would make air travel impossibly expensive. He has suggested that rocket launches could 【C5】______be much cheaper since the cost of the rocket propellants are less than 1 percent of the full-price ticket for a launch. So, if a rocket could be simply refueled like a jetliner for another flight, the cost of space travel could drop to a 【C6】______of what it is now. The stresses of spaceflight on reused boosters, however, are much greater than those on jetliners. The economics will depend on how many times a booster can be flown, and how much the 【C7】______expense will be to repair the booster each time.
   Reusable spaceships are not a new idea. NASA’s space shuttles were the first real 【C8】______at a reusable spaceship, but the shuttles proved more 【C9】______than hoped, requiring an army of technicians to 【C10】______them between flights. As a result, they ended up being more expensive than expendable rockets. [br] 【C8】
选项
答案 A
解析 空格前是形容词real，空格后是介词短语，且分析句子结构可知，本句缺少表语，因此，空格处应填入一个名词作系动词were的表语。本段第一句提到，太空船的重复使用并非新概念，原因是美国国家航空航天局之前曾经首次尝试重复使用过太空船，故A项attempt“努力，尝试”为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3743787.html
相关试题推荐
随机试题
最新回复(0)