根据下面内容，回答176-180题
There are two factors which determine an individual's intelligence．The first is the sort ofbrain he is born with．Human brains differ considerably, some being more capable than others．Butno matter how good a brain he has to begin with, an individual will have a low order of intelli-gence unless he has opportunities to learn．So the second factor is what happens to the individual--the sort of environment in which he is brought up．If an individual is handicapped environmentally,it is likely that his brain will fail to develop and he will never attain the level of intelligence ofwhich he is capable.
The importance of environment in determining an individual's intelligence can be demonstrat-ed by the case history of the identical twins, Peter and Mark．Being identical, the twins had iden-tical brains at birth, and their growth processes were the same．When the twins were three monthsold, their parents died, and they were placed in separate foster homes．Peter was raised by parentsof low intelligence in an isolated community with poor educational opportunities．Mark was reared
in the home of well-to-do parents who had been to college．He was read to as a child, sent to goodschools, and given every opportunity to be Stimulated intellectually．This environmental differencecontinued until the twins were in their late teens, when they were given tests to measure their in-telligence．Mark's I.Q．was 125, twenty-five points higher than the average and fully forty pointshigher than his identical brother．Given equal opportunities, the twins, having identical brains,would have tested at roughly the same level.

A:human brains differ considerably B:the brain a person is born with is important in determining his intelligence C:environment is crucial in determining a person's intelligence D:persons having identical brains will have roughly the same intelligence

You are in the process of developing options，and determining actions to enhance opportunities and reduce threats to the project's objectives．What should you be doing next ？（）

A:Determining which risks might affect the project and documenting their characteristics B:Identifying，analyzing and planning for newly arising risks C:Deciding how to approach and conduct risk management activities for the project D:Assessing the priority of identified risks using their probability of occuring

You are in the process of developing options，and determining actions to enhance opportunities and reduce threats to the project's objectives．What should you be doing next

A:Determining which risks might affect the project and documenting their characteristic B:Identifying，analyzing and planning for newly arising risk C:Deciding how to approach and conduct risk management activities for the projec D:Assessing the priority of identified risks using their probability of occurin

Text 3
People have wondered for a long time how their personalities and behaviors are formed, h is not easy to explain why one person is intelligent and another is not, or why one is cooperative and another is competitive.
Social scientists are, of course, extremely interested in these types of questions. They want to explain why we possess certain characteristics and exhibit certain behaviors. There are no clear answers yet, but two distinct schools of thought on the matter have developed. As one might expect, the two approaches are very different from one another, and there is a great deal of debate between proponents of each theory. The controversy is often referred to as "nature/nurture".
Those who support the "nature" side of the conflict believe that our personalities and behavior patterns are largely determined by biological and genetic factors. That our environment has little, if anything, to do with our abilities, characteristics, and behavior is central to this theory. Taken to an extreme, this theory maintains that our behavior is predetermined to such a degree that we are almost completely governed by our instincts.
Proponents of the "nurture "theory, or, as they are often called, behaviorists, claimed that our environment is more important than our biologically based instincts in determining how we will act. A behaviorist, B. F. Skinner sees humans as beings whose behavior is almost completely shaped by their surroundings. The behaviorists’ view of the human being is quite mechanistic; they maintain that, like machines, humans respond to environmental stimuli as the basis of their behavior.
Either of these theories cannot yet fully explain human behavior. In fact, it is quite likely that the key to our behavior lies somewhere between these two extremes. That the controversy will continue for a long time is certain.

A:supports the nature theory B:believes in the importance of genes in determining personality C:thinks the environment plays an important role in determining character D:believes instincts govern behavior

Text 3 People have wondered for a long time how their personalities and behaviors are formed, h is not easy to explain why one person is intelligent and another is not, or why one is cooperative and another is competitive. Social scientists are, of course, extremely interested in these types of questions. They want to explain why we possess certain characteristics and exhibit certain behaviors. There are no clear answers yet, but two distinct schools of thought on the matter have developed. As one might expect, the two approaches are very different from one another, and there is a great deal of debate between proponents of each theory. The controversy is often referred to as "nature/nurture". Those who support the "nature" side of the conflict believe that our personalities and behavior patterns are largely determined by biological and genetic factors. That our environment has little, if anything, to do with our abilities, characteristics, and behavior is central to this theory. Taken to an extreme, this theory maintains that our behavior is predetermined to such a degree that we are almost completely governed by our instincts. Proponents of the "nurture "theory, or, as they are often called, behaviorists, claimed that our environment is more important than our biologically based instincts in determining how we will act. A behaviorist, B. F. Skinner sees humans as beings whose behavior is almost completely shaped by their surroundings. The behaviorists’ view of the human being is quite mechanistic; they maintain that, like machines, humans respond to environmental stimuli as the basis of their behavior. Either of these theories cannot yet fully explain human behavior. In fact, it is quite likely that the key to our behavior lies somewhere between these two extremes. That the controversy will continue for a long time is certain.

A:supports the nature theory B:believes in the importance of genes in determining personality C:thinks the environment plays an important role in determining character D:believes instincts govern behavior

There are two factors which determine an individual’s intelligence. The first is the sort of brain he is born with. Human brains differ considerably, some being more capable than others. But no matter how good a brain he has to begin with, an individual will have a low order of intelligence unless he has opportunities to learn. So the second factor is what happens to the individual—the sort of environment in which he is reared. If an individual is handicapped environmentally, it is likely that his brain will fail to develop and he will never attain the level of intelligence of which he is capable.
The importance of environment in determining an individual’s intelligence can be demonstrated by the case of the identical twins, Peter and Mark Being identical, the twins had identical brains at birth, and their growth processes were the same. When the twins were three months old, their parents died, and they were placed in separate foster homes. Peter was reared by parents of low intelligence in an isolated community with poor educational opportunities. Mark was reared in the home of well to do parents who had been to college. He was read to as a child, sent to good schools, and given every opportunity to be stimulated intellectually. This environmental difference continued until the twins were in their late teens, when they were given tests to measure their intelligence. Mark’s IQ was 125, twenty five points higher than the average and fully forty points higher than his identical brother. Given equal opportunities, the twins, having identical brains, would have tested at roughly the same level.

A:human brains differ considerably B:the brain a person is born with is important in determining his intelligence C:environment is crucial in determining a person’s intelligence D:persons having identical brains will have roughly the same intelligence