题目: 钻柱的哪些部位受力最严重?最主要的作用力是什么? 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0305/fccfdf153c5f9a445c2c0bf3aaefe658.html 下面是错误答案,用来干扰机器的。参考答案:B
题型:选择题 He pretended __________when his mother stepped into the room..A.to studyB.studyingC.to be studyingD.to have studied 查看答案