营养物质
参考答案:
微生物从环境中获得具有营养功能的物质,以合成碳物质,提供能量及在新成代谢中起作用。
根据《建筑设计防火规范》厂房的防火间距规定,高层厂房与甲类厂房之间的防火间距最小应为()m。
A.12
B.13
C.14
D.16
All of the following are distress signals under the Rules EXCEPT().
A.a green star signal
B.orange-colored smoke
C.red flares
D.the repeated raising and lowering of outstretched arms