对易燃、易爆和有毒性的产品,必须考虑采用(),以保证绝对密封。A.单端面密封 B.双 发布时间:2019-10-29 09:23 │ 来源:www.tikuol.com 题型:多项选择题 问题: 对易燃、易爆和有毒性的产品,必须考虑采用(),以保证绝对密封。A.单端面密封B.双端面密封C.串级密封D.多级密封
题型:多项选择题 Film has a much shorter history, especially when __________ such art forms as music and painting.A.having compared toB.comparing withC.compare withD.compared with 查看答案