2. 外语
  3. Had electronic computers not been invented, many problems on space flight______.

Had electronic computers not been invented, many problems on space flight______.

admin2015-01-30  69
问题 Had electronic computers not been invented, many problems on space flight______.
选项 A、could not have been solved
B、could not be solved
C、can not be solved
D、could not have solved
答案A
解析
转载请注明原文地址:https://www.kaotiyun.com/show/csNK777K
本试题收录于： C类竞赛（非英语专业本科）题库大学生英语竞赛（NECCS）分类
0

C类竞赛（非英语专业本科）

大学生英语竞赛（NECCS）

相关试题推荐
随机试题
最新回复(0)