在N=32的时间抽取法FFT运算流图中，从x（n)到X（k)需要（)级蝶形运算过程。

A．4

B．5

C．6

D．3

roblem, one must remember that modern American woman is freed.During childhood and youth, the American girl is given freedom and education which is equal to a boy’s.After completing school, she is able to get a job and support herself.She doesn’t have to marry for financial security.She considers herself an independent, self-sufficient person.She wants a husband whom she can respect.She wants a democratic household in which she has a voice in making decisions.When a husband and wife are able to share decision-making, their marriage is probably closer, stronger, and more satisfying.Otherwise, the couple is likely to wind up in the divorce court.

When a couple gets divorced, the court usually requires the man to pay his former wife a monthly sum of money.If the couple has children, they usually remain with the mother, and the father is expected to pay for their support.

Although divorce is quite common in the United States, 80 percent of those who get divorced remarry.The remarriages allow thousands of people, especially children, to enjoy family life again, but at the same time many troubles have arisen.A well-known American joke tells of a wife calling to her second husband, “Quick, John! Come here and help me! Your children are beating up our children!”

6.What does the passage mainly discuss?()

A.Financial trouble in the family

B.Different attitudes between husband and wife towards children’s education

C.Women’s liberation movement

D.Lack of democratic atmosphere in the household often leads to divorce

7.What do you know of modern American women according to the passage?()

A.They are overbearing

B.They respect their husbands, but do not listen to them

C.They do not have much to say in the household

D.They are more independent than ever before

8.What kind of marriage can be successful according to the passage?()

A.Both the man and woman are financially secure

B.husband and wife share housework

C.Decisions are made by the man and woman together

D.Both the man and woman are well-educated

9.What happens when a couple is divorced according to the passage?()

A.The children become homeless

B.The man, rather than the woman, remarries soon

C.Life becomes difficult for the woman and her children

D.The man is still held responsible for the welfare of his children

10.What does the well-known joke suggest?()

A.Remarriages often end up in failure

B.Children are unhappy in the new family

C.The mother is not respected by the stepchildren

D.Remarriage causes new troubles in the household

此题为判断题(对，错)。