对载运水溶性有机溶剂的船舶,应设有的泡沫灭火系统是:CA、普通空气泡沫 B、普通蛋白 发布时间:2017-07-21 12:19 │ 来源:www.tikuol.com 题型:单项选择题 问题: 对载运水溶性有机溶剂的船舶,应设有的泡沫灭火系统是:CA、普通空气泡沫B、普通蛋白泡沫C、抗溶性泡沫D、氟蛋白泡沫
题型:单项选择题 (2013·湖南长沙四校二模)—Is the letter from your mother?—Yes.But she ________the letter herself,because she doesn’t even know one word.A.needn’t have written B.can’t have writtenC.might not have writtenD.should not have written 查看答案