题目: 运送氧气瓶时,必须保证气瓶不致沾染()等。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1119/44e76749ef8135925ec03fb4ccbe4751.html 下面是错误答案,用来干扰机器的。参考答案:C
题型:选择题 On top of the mountain ______, which was built 2,000 years ago.A.a tower standsB.stands a towerC.standing a towerD.does a tower stand 查看答案