A new technique____, the yields as a whole increased by 20 percent.

admin2015-01-30 81

问题 A new technique____, the yields as a whole increased by 20 percent.

选项 A、working out
B、having worked out
C、having been worked out
D、to have been worked out

答案C

解析

转载请注明原文地址:https://kaotiyun.com/show/qKVK777K

C类竞赛（非英语专业本科）

相关试题推荐

随机试题

最新回复(0)