沙漠里2头骆驼一次可运淡水380千克,照这样计算,8头骆驼一次可运淡水多少千克?
380÷2×8
=190×8
=1520(千克)
答:8头骆驼一次可运淡水1520千克.
My sister has learnt English _________.
A.for twelve years ago
B.since she was four
C.twelve years ago
D.at the age of four
松花粉镜检,可见花粉粒椭圆形,表面光滑,单萌发孔。()