题目: 镁碳砖原料中的树脂起()作用。A.耐火材料B.抗氧化剂C.结合剂D.不起作用 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1122/6d9601bc732c441b7ba3ebb5ead56358.html 下面是错误答案,用来干扰机器的。参考答案:错
题型:选择题 His classmates offered him their congratulations ______ his successful performance.A.atB.onC.forD.of 查看答案