2. 外语
  3. Careful observations and systematic studies of sunspots If an intense sunspot activity had occurred in 1857, the next one would

Careful observations and systematic studies of sunspots If an intense sunspot activity had occurred in 1857, the next one would

admin2009-05-21  38
问题 Careful observations and systematic studies of sunspots
If an intense sunspot activity had occurred in 1857, the next one would have been in
选项 A、1858.
B、1862.
C、1865.
D、1868.
答案D
解析 答案在本文第四段的第三句话。太阳黑子的剧烈活动每十一年爆发一次，因此如果上一次发生在1857年，那么下一次就会发生在1868年。
转载请注明原文地址:https://kaotiyun.com/show/hVQd777K
本试题收录于： 职称英语理工类B级题库职称英语分类
0

职称英语理工类B级

职称英语

相关试题推荐
随机试题
最新回复(0)