单选:锅炉的受热面上结有水垢后,由于水垢的导热性能比金属性能差(),就会影响锅炉的传热效率。 题目分类:安全生产法及相关法律知识 题目类型:单选 查看权限:VIP 题目内容: 锅炉的受热面上结有水垢后,由于水垢的导热性能比金属性能差(),就会影响锅炉的传热效率。A.几倍B.十几倍C.几十倍D.百倍 参考答案:
By the time I got home,my grandmother __________ the dinner and was watching TV By the time I got home,my grandmother __________ the dinner and was watching TV. 分类:安全生产法及相关法律知识 题型:单选 查看答案
In 2008, the United States Department of Agriculture (USDA) wanted to know if al In 2008, the United States Department of Agriculture (USDA) wanted to know if all the school lunches 分类:安全生产法及相关法律知识 题型:单选 查看答案
Eleanor Roosevelt was the wife of America′s 32nd president,Franklin Roosevelt.Sh Eleanor Roosevelt was the wife of America′s 32nd president,Franklin Roosevelt.She helped her husband 分类:安全生产法及相关法律知识 题型:单选 查看答案
女性,40岁。既往有风湿性心脏病史,近一周出现咳嗽、咯痰,双下肢浮肿,不能平卧。该患者还可能出现下列哪项体征( ) 女性,40岁。既往有风湿性心脏病史,近一周出现咳嗽、咯痰,双下肢浮肿,不能平卧。该患者还可能出现下列哪项体征( ) A.呼吸过缓B.深大呼吸C.潮式呼吸D.呼吸过速E.叹息样呼吸 分类:安全生产法及相关法律知识 题型:单选 查看答案
--Would you like to go to the theater with me tonight?__________,but I don′t thi --Would you like to go to the theater with me tonight?__________,but I don′t think I can afford the 分类:安全生产法及相关法律知识 题型:单选 查看答案