问题描述：
these have not had any effect这里为什么用these呢?能不能用this.these指的是Jasper has put up“no p
these指的是Jasper has put up“no parking”signsoutside his gate 这件事
these指的是Jasper has put up“no parking”signsoutside his gate 这件事
问题解答：
我来补答展开全文阅读