Inspired by dolphins, people have learnt how to send signals underwater, ______ is currently employed in tsunami early-

当前位置：高中英语 / 单选题

1. (2022高二下·和平期末) Inspired by dolphins, people have learnt how to send signals underwater, ______ is currently employed in tsunami early-warning systems.

A . which B . that C . who D . what

微信扫码预览、分享更方便

使用过本题的试卷