下列物质中分子量最大的是()
A.汽油
B.液态烃
C.柴油
D.煤油
参考答案:C
发生特大火灾事故和造成重大人员伤亡或社会影响较大的灾害事故后,辖区内县级公安消防部门在立即上报支队的同时,要立即上报总队和公安部消防局。()
A word processor enables you to create a (66) ., store it electronically on a disk, display it on a screen, modify it by entering commands and characters from the keyboard, and print it on a printer.
A.file
B.document
C.text
D.paper