消防安全检查内容包括用火、用电有无违章情况、灭火器材配置及有效情况、消防安全重点部位的管理情况等。
公用建筑中有空间跨度的非钢结构的展览馆、歌剧院等超过24m的一类工程，企业管理费费率、利润率乘以系数（）。 ["1.1","1.15","1.03","1.08"]
在25℃的条件下，CaCO3的溶解度为（）mol／L。 ["73","63","53","43"]
When a vessel is in dry-dock, the vessel’s engineers should （）. ["examine the condition of the propeller","chip and paint all hull protection zincs","install new docking plugs in all cofferdams","inspect the hull for hogging or sagging"]
什么是跨膜信号转换？
怎样安全使用电热毯？
