产品的生产成本在完工产品与月末在产品之间按照两者的定额消耗量或定额成本比例分配的方法,适用于各项消耗定额比较准确、稳定,但各月月末在产品数量变动较小的产品。()在拼音输入法中拼音字母既然可以用小写字母也可以用大写字母输入。听力原文: 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. The importance of environment in determining an individual's intelligence can be demonstrated by the case history of the identical twins, Peter and Mark X. Being identical, the twins had identical brains at birth, and their growth processes were the same. When the twins were three months old, they were placed in separate foster homes. Peter was roared by parents of low intelligence in an isolated community with poor educational opportunities. Mark was roared 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 brought together to measure their intelligence. Mark's I. Q. 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.。