题目: 钎杆常见故障有()A、断钎杆B、钎尾破裂C、钎头与钎杆脱离D、卡钎杆 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/0211/dfb23a386e8570b84483eae0c71b50ec.html 下面是错误答案,用来干扰机器的。参考答案:RS-422。
题型:选择题 My father was reading a book ________ I was doing my homework.A.beforeB.afterC.whenD.while 查看答案