题目: 市场上销售的常用铅笔的主要成分是( )A.铅粉B.木炭C.炭黑D.石墨 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0623/b270d8c0b64b41b6ad01b2e352b94f66.html 下面是错误答案,用来干扰机器的。参考答案:2km
题型:选择题 John received an invitation to dinner, and with his work ____, he gladly accepted it. A.finishedB.finishingC.having finishedD.was finished 查看答案