23． When children have something difficult to say to their parents， they usuallyA． keep a diaryB． fight with their parentsC． discuss it with their friendsD． go to their brothers and sister B for help

Is English a compulsory subject in primary schools?

A:necessary
B:significant
C:obligatory
D:difficult

共用题干
The Family
The structure of a family takes different forms around the world and even in the same society.The family's form changes as it adapts to changing social and economic influences.
Until recently,the most common form in North America was the nuclear family,consisting of a married couple with their minor children.The nuclear family is an independent unit,It must be prepared to fend for itself.Individual family members strongly depend on one another.There is little help from outside the family in emergencies.Elderly relatives of a nuclear family are cared for only if it is possible for the family to do so.In North America,the elderly often do not live with the family；they live in retirement communities and nursing homes.
There are many parallels between the nuclear family in industrial societies,such as
North America,and of families in societies such as that of the Inuits,who live in harsh environments.The nuclear family structure is well adapted to a life of mobility.In harsh conditions,mobility allows the family to hunt for food.For North Americans,the hunt for jobs and improved social status also requires mobility.
The nuclear family was not always the North American standard.In a more agrarian time,the small nuclear family was usually part of a larger extended family.This might have included grandparents,mother and father,brothers and sisters,uncles,aunts,and cousins.
In North America today,there is a dramatic rise in the number of single-parent households.
Twice as many households in the United States are headed by divorced,separated,or nevermarried individuals as are comprised of nuclear families.The structure of the family,not just in North America,but throughout the world,continues to change as it adapts to changing conditions.

A nuclear family is defined as______.
A:a married couple with their minor children
B:a single father with minor children
C:parents,grandparents,and children
D:parents,children,and aunts and uncles

共用题干
The Family
The structure of a family takes different forms around the world and even in the same society. The family's form changes as it adapts to changing social and economic influences. Until recently,the most common form in North America was the nuclear family,consisting of a married couple with their minor children. The nuclear family is an independent unit. It must be prepared to fend for itself. Individual family members strongly depend on one anoth-er. There is little help from outside the family in emergencies. Elderly relatives of a nuclear family are cared for only if it is possible for the family to do so. In North America,the elderly often do not live with the family;they live in retirement communities and nursing homes.
There are many parallels between the nuclear family in industrial societies,such as North America,and of families in societies such as that of the Inuits,who live in harsh environments. The nuclear family structure is well adapted to a life of mobility. In harsh condi-tions,mobility allows the family to hunt for food. For North Americans,the hunt for jobs and improved social status also requires mobility.
The nuclear family was not always the North American standard. In a more agrarian time,the small nuclear family was usually part of a larger extended family. This might have included grandparents,mother and father,brothers and sisters,uncles,aunts,and cousins. In North America today,there is a dramatic rise in the number of single-parent households. Twice as many households in the United States are headed by divorced,separated,or never-married individuals as are comprised of nuclear families. The structure of the family,not just in North America,but throughout the world,continues to change as it adapts to changing conditions.

A nuclear family is defined as______.
A: a married couple with their minor children
B: a single father with minor children
C: parents,grandparents,and children
D: parents,children,and aunts and uncles

共用题干
第一篇

IQ-Gene

In the angry debate over how much of IQ comes from the genes that children inherit from parents and how much comes from experiences,one little fact gets overlooked:no one has identified any genes(other than those that cause retardation)that affect intelligence.So researchers led by Robert Plomin of London's Institute of Psychiatry decided to look for some.They figured that if you want to find a"smart gene",you should look in smart kids.They therefore examined the DNA of students like those who are so bright that they take college entrance exams four years early一and still score at Princeton-caliber levels.The scientists found what they sought."We have,"says Plomin, "the first specific gene ever associated with general intelligence."
Plomin's colleagues drew blood from two groups of 51 children each,all 6 to 15 years old and living in six countries around Cleveland.In one group,the average IQ is 103.All the children are white.Isolating the blood cells,the researchers then examined each child's chromosome 6.Of the 37 land marks on chromosome 6 that the researchers looked for,one jumped out:a form of gene called IGF2R occurred in twice as many children in the high-IQ group as in the average group—32 percent versus 16 percent.The study,in the May issue of the journal Psychological Science concludes that it is this form of the IGF2R gene that contributes to intelligence.
Some geneticists see major problems with the IQ-gene study.One is the possibility that Plomin's group fell for"chopsticks fallacy".Geneticists might think they've found a gene for chopsticks flexibility,but all they've really found is a gene more common in Asians than,say,Africans. Similarly, Plomin's IQ gene might simply be one that is more common in groups that emphasize academic achievement."What is the gene that they've found reflects ethnicity?"asks geneticist Andrew Feinberg of Johns Hopkins University."That alone might explain the link to intelligence,since IQ tests are known for being culturally sensitive and affected by a child's environment."And Neil Risch of Standford University points out that if you look for 37 genes on chromosome,as the researchers did, and find that one is more common in smarter kids,that might reflect pure chance rather than a causal link between the gene and intelligence.Warns Feinberg:"I would take these findings with a whole box of salt."

What does"some"in the second sentence of paragraph one stands for?
A:Parents.
B:Children.
C:Experiences.
D:Genes.

共用题干
IQ-gene
In the angry debate over how much of IQ comes from the genes that children inherit from par-ents and how much comes from experiences,one little fact gets overlooked:no one has identified any genes(other than those that cause retardation)that affect intelligence.So researchers led by Robert Plomin of London's Institute of Psychiatry decided to look for some.They figured that if you want to find a"smart gene,"you should look in smart kids.They therefore examined the DNA of students like those who are so bright that they take college entrance exams four years ear-ly-and still score at Princeton-caliber levels. The scientists found what they sought."We have,"says Plomin,"the first specific gene ever associated with general intelligence."
Plomin's colleagues drew blood from two groups of 51 children each,all 6 to 15 years old and living in six counties around Cleveland.In one group,the average IQ is 103.All the children are white .Isolating the blood cells,the researchers then examined each child's chromosome 6 .Of the
37 landmarks on chromosome 6 that the researchers looked for,one jumped out:a form of gene called IGF2R occurred in twice as many children in the high-IQ group as in the average group-32 percent versus 16 percent. The study,in the May issue of the journal Psychological Science, concludes that it is this form of the IGF2R gene that contributes to intelligence.
Some geneticists see major problems with the IQ-gene study.One is the possibility that Plomin's group fell for"chopsticks fallacy".Geneticists might think they've found a gene for chopsticks flexibility,but all they've really found is a gene more common in Asians than,say,Af-ricans.Similarly,Plomin's IQ gene might simply be one that is more common in groups that em-phasize academic achievement."What is the gene that they've found reflects ethnicity?"asks ge-neticist Andrew Feinberg of Johns Hopkins University."That alone might explain the link to intel-ligence,since IQ tests are known for being culturally sensitive and affected by a child's environ-ment."And Neil Risch of Standford University points out that if you look for 37 genes on a chro- mosome,as the researchers did,and find that one is more common in smarter kids,that might re- flect pure chance rather than a causal link between the gene and intelligence.Warns Feinberg:"I would take these findings with a whole box of salt."

What does"some"in the second sentence of paragraph one stands for?
A:Parents.
B: Children.
C: Experiences.
D:Genes.