下列离子方程式书写正确的是( )
A:铁溶于盐酸中 2Fe+6H+=2Fe3++3H2↑
B:碳酸钠与硫酸溶液反应 CO32ˉ+H+=CO2↑+H2O
C:二氧化硫被烧碱溶液吸收 SO2+2OHˉ=SO32ˉ+H2O
D:铜与稀硝酸反应 Cu+8H++2NO3ˉ=Cu2++2NO↑+4H2O
A: ____
B:Yes. These shoes are very nice. ____
A: ____ Here you are. Are they OK?
B:They're too small.
A:Hmm. OK. ____
B:Let me try. ____
A:Good!
A. How about size 8?
B. They're just right.
C. Can I help you?
D. Of course.
E. Can I try them on?
下列句子中,划线字的字形和注音都完全正确的一项是( )