加氢装置检修时,容器内可能含有的有毒有害气体有()。A、硫化氢 B、氨气 C、轻烃 发布时间:2019-10-22 23:49 │ 来源:www.tikuol.com 题型:多项选择题 问题: 加氢装置检修时,容器内可能含有的有毒有害气体有()。A、硫化氢B、氨气C、轻烃D、氯化氢
题型:多项选择题 Jane's always nervous when she has to make a speech; she must accustom herself to be __ when she is with people. [ ]A. at ease B. in disguise C. at risk D. in relief 查看答案