食堂运来了850千克大米,吃了16天,平均每天吃28千克,还剩多少千克大米?
850-28×16,
=850-448,
=402(千克);
答:还剩402千克大米.
Nearly two weeks passed_____the old man was able to explain what had happened to him.
A.when
B.till
C.before
D.while
中国从南至北呈现出赤道带、热带、亚热带、暖温带、温带、寒温带六个温度带;降水量从东南向西北逐渐减少,各地年平均降水量差异很大。( )