9比6多______%,6比9少______%.
(1)(9-6)÷6,
=3÷6,
=50%;
(2)(9-6)÷9,
=3÷9,
≈33.33%;
故答案为:50,33.33.
Although I like junk food, _____ I try to _____ only once a month.
分流道截面型状的效率最好是()。
A.圆型
B.方型
C.梯型
D.半圆型(U型)