用14除830与242的差,商是多少?
(830-242)÷14,
=588÷14,
=42;
答:商是42.
人体能量的主要食物来源是()
A.谷类
B.肉类
C.蛋类
D.奶类
E.豆类
The speech by the headmaster given on my graduation ceremony is strongly impressed ___ my memory.
A.to
B.over
C.by
D.on