在()里填适当的分数。4u'q6S,a8P5M
1,80>80×.B(E8\1e(N5L+L,b0l4j/[4u'q6S,a8P5M
2,3/4÷)u6u+i2Y:{0?;r,r7T>3/44u'q6S,a8P5M
3,11/9-,M4P,G+o6[/Y9S,j9K=14u'q6S,a8P5M