有四个数,它们的平均数是5.把其中一个数1改为9,那么它们的平均数变成了______.
5+(9-1)÷4,
=5+8÷4,
=5+2,
=7,
答:它们的平均数变成了7.
故答案为:7.
中国革命和建设的基本立足点是
A.实事求是
B.独立自主
C.群众路线
D.对外开放
The seven dwarfs in "Snow White" are______seventy centimeters tall.
A.almost more than
B.hardly more than
C.nearly more than
D.as much as