13. Computers --- into space

学习时间:2026-03-31 20:19:51 阅读：9736

13. Computers ___ into space rockets and sent to explore the moon and Mars since 1970s. A. were put B. put C. have put D. have been put 麻烦您给解答一下,谢谢

犹豫的曲奇

2026-03-31 20:19:51



解题思路：计算机已经被投入太空送到去探索月球和火星自从20世纪70年代解题过程： D 首先since是现在完成时的标志 C D 是完成时态计算机和投入太空是被动关系所以用D 最终答案：已给