问题 单项选择题

下列对骨质疏松描述错误的是()

A.骨质疏松症可分为原发性、继发性两类

B.雌激素可抑制骨吸收,雌激素水平不足是病因之一

C.多数患者为原发性骨质疏松症

D.女性绝经期后发病率升高

E.骨折是本病最为严重的后果

答案

参考答案:A

解析:骨质疏松症是老年人常见的代谢性骨病。分为原发性、继发性及特发性三类,其中,原发性占绝大多数。雌激素缺乏可导致骨吸收增强,引起骨丢失。因此绝经后患病率升高。本病最大的危害是骨折发生,常发生的部位有脊椎、髋部和前臂等,以髋部骨折后果最为严重,可导致各种并发症、致残或死亡。

单项选择题

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.

According to the passage, the average IQ is ().

A.85

B.100

C.110

D.125

单项选择题