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问题 单项选择题

下列关于线性链表的叙述中，正确的是( )。

A．各数据结点的存储空间可以不连续，但它们的存储顺序与逻辑顺序必须一致

B．各数据结点的存储顺序与逻辑顺序可以不一致，但它们的存储空间必须连续

C．进行插入与删除时，不需要移动表中的元素

D．以上三种说法都不对

答案

参考答案：C

解析： 线性表的链式存储结构称为线性链表。在链式存储结构中，存储数据结构的存储空间可以不连续，各数据结点的存储顺序与数据元素之间的逻辑关系可以不一致，而数据元素之间的逻辑关系是由指针域来确定的。

填空题

平行四边形对角（    ）。
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单项选择题

Many immigrants to the United States find the decision to seek better lives for their families in America can have an unexpected and tragic consequence. Deep differences with their children develop over language and culture.
"Many immigrants arrive here without much education. Their kids soon gain language skills and also street marts on how to live in America, leaving the parents at a disadvantage, " Ileana, Roses, pastor of a Methodist church group operating in Virginia, said.
"Not only that but they find they cannot relate to children who quickly absorb American culture, " she said.
According to the US Census Bureau, the number of foreign born or first generation Americans reached 55 million last year, a record one in five of the total population.
A government survey of 922 immigrants in 2000 found that nearly 40 percent of those who had been in the United States for more than 15 years would still like to take English classes if they had the time.
Two thirds of low income households depended on their children for translation.
Psychologists and sociologists say parents can lose their position of authority in a family as a result and the effects of that can be far-reaching.
Children exposed to American pop culture that glorifies youth and sexuality often rebel when their parents try to impose the conservative values they brought with them.
"Americanization erodes all important aspects of parenting, " said Richard Weissbourd, who teaches education at Harvard University.
"I feel a part of me is dying with my children. They don’t listen to my music. I have to play it on Sunday morning when they are not around, " said an immigrant.

Which of the following is true according to the passage

A. All the immigrants had expected the troubles they would meet before they went to the US.
B. Two thirds of immigrant families are low income households.
C. American culture shows a spirit against conservative social and cultural values.
D. American pop culture puts the immigrant families at a disadvantage.
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