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问题 解答题

红花3朵；黄花2朵；白花4朵．

（1）红花占这束鲜花的几分之几？

（2）黄花与白花共占这束鲜花的几分之几？

答案

（1）3÷（3+2+4），

=3÷9，

=

1
3
．

答：红花占这束鲜花的

1
3
．

（2）（2+4）÷（3+2+4），

=6÷9，

=

2
3
．

答：黄花与白花共占这束鲜花的

2
3
．

单项选择题

Which of the following statements best explains how automatic stabilizers work Even without a change in fiscal policy, automatic stabilizers tend to promote:（）

A. a budget surplus during a recession and a budget deficit during an inflationary expansion.

B. a budget deficit during a recession but do not promote a budget surplus during an inflationary expansion.

C. a budget deficit during a recession and a budget surplus during an inflationary expansion.
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解答题
解方程和比例
6.5：X=3.25：4
3
20
X-X=17
2
3
X-
12
5
=
13
5
．
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