Sorry, I can't ________ you. Can you ________ it again?
A:listen to; speak
B:hear; tell
C:listen to; talk
D:hear; say
试验次数
金属质量(g)
金属氧化物质量(g)
1
45.0
84.9
2
85.1
3
85.0
平均值
m
若单项式13a3bn+1和2a2m﹣1b3是同类项,求3m+n的值.
六千零四十万零四写作:____