按蓄热介质分类,蓄热系统可分为水蓄冷、蒸汽蓄热和()。A.优态盐蓄热; B.相变材料 发布时间:2019-09-27 19:25 │ 来源:www.tikuol.com 题型:单项选择题 问题: 按蓄热介质分类,蓄热系统可分为水蓄冷、蒸汽蓄热和()。A.优态盐蓄热;B.相变材料蓄热;C.太阳能蓄热;D.电阻蓄热
题型:单项选择题 Of the 2000 stock investors last month, 90% was found in financial knowledge. [ ]A. surveyed; lackingB. having been surveyed; to lackC. surveyed; lackedD. to have been surveyed; lack 查看答案