A:果蝇的受精卵
B:人的精细胞
C:四倍体水稻的精子
D:人的神经细胞
64+10=____ 98-50=____ 5×5=____ 81÷9= ____ 4×0=____
20-10-3=____ 25+25-20=____ 1元2角-3角=____
从学校经过百鸟园到猴山,有哪几条路可以走,请列举出来.
—What's your idea about family education?— kids learn to be independent, it is for their future.