50kg铁桶装染布用灰色分散染料

为了解颈脊髓损伤的情况，选择下列哪项影像学检查最好

A．双斜位片

B．脊髓造影

C．CT平扫

D．MRI

E．椎动脉造影

蛛网膜下腔出血最常见的病因是（）

A.高血压

B.风湿性心脏病瓣膜赘生物、附壁血栓脱落

C.高血压和脑动脉粥样硬化同时存在

D.脑动脉粥样硬化

E.先天性动脉瘤破裂

在打开油气层后，提高钻井液密度时应均匀，一般每循环周提高不大于（）g/cm³。

A、0.01--0.02

B、0.02--0.03

C、0.03--0.04

D、0.04--0.05

四逆散适用于（）。

A.肝郁血虚脾弱证

B.阳郁四逆证

C.虚寒厥逆证

D.肝脾不和证

E.肠胃不和证

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 selection can best be titled （）.

A．Measuring Your Intelligence.

B．Intelligence and Environment.

C．The Case of Peter and Mark.

D．How the Brain Influences Intelligenc