下列说法正确的是 ( )A.丙烯的结构简式为CH3CHCH2B.由SO2通入硝酸钡溶液产生白色沉淀可知,BaSO3不溶于硝酸C.在中和滴定中,既可用标准液滴定待测液,也可用待测液滴定标准液D.用酸性高锰酸钾溶液可以鉴别乙烯和乙炔 答案: C
-Go to clean the room, Bob!
-How can I, mom.The room is a terrible ________, with papers and the things ________ about.
[ ]
A.
mess; laid
B.
dirty; lying
C.
disorder; lain
D.
mess; lying