(2007·烟台模拟)“乡音难改”、“耳濡目染”，分别说明文化对人的影响具有 (

26岁女性，停经16周，下腹胀痛伴少许 * * 出血4天，停经6周时有轻度恶心。查宫口闭，子宫8周妊娠大小，尿妊娠试验（+）
30岁女性，停经2个月，7天前 * * 少许出血，今晨起阵发性腹痛，出血量增多。检查 * * 有血块，宫口开，有组织物堵塞，子宫2个月大小

A.先兆流产

B.难免流产

C.不全流产

D.完全流产

E.稽留流产

做好重大建设工程治安保卫工作，要求做到（）。

A.制定各项管理制度

B.落实治安保卫责任

C.依法监督隐患整改

D.赏罚分明

E.依法处理事故责任者

（）的特点是发送时先分散后集中，到达时先集中后分散。

A.客流

B.货流

C.车流

D.箱流

代理人在代理活动中应注意下列问题（）。

A.应在代理权限范围内进行代理活动

B.应亲自进行代理活动

C.应认真履行职责

D.应严格按被代理人的指示活动

E.不得滥用代理权

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.

This passage suggests that an individual’s IQ（）.

A．can be predicted at birth

B．stays the same throughout his life

C．can be increased by education

D．is determined by his childhood