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问题 推断题

下列框图中的物质均为初中化学常见的物质，其中A是建筑材料的主要成分，B属于氧化物，下图是它们之间的相互转化关系。请回答：

（1）写出下列物质的化学式：A                ，C                     。

（2）若G是红褐色沉淀，请写出F的化学式                       。

（3）若G是蓝色沉淀，请写出B→F的化学方程式                    。

答案

（1）CaCO3 ；CO2

（2）FeCl3

（3）CuO+2HCl= CuCl2+ H2O

单项选择题

下列关于函数的叙述中正确的是( )。

A．每个函数都可以被其他函数调用(包括main函数)

B．每个函数都可以被单独编译

C．每个函数都可以单独运行

D．在一个函数内部可以定义另一个函数
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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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