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问题 单项选择题

4G是第四代移动通信及其技术的简称，是集3G与WLAN于一体并能够传输高质量视频图像并且图像传输质量与高清晰度电视不相上下的技术产品。下列由我国主导的4G国际标准是( )。

A．TD—SCDMA
B．TD—LTE
C．WiMAX
D．WirelessMAN-Advanced

答案

参考答案：B

解析： TD-LTE即Time Division Long Term Evolution(分时长期演进)，是由阿尔卡特-朗讯、诺基亚西门子通信、大唐电信、华为技术、中兴通讯、中国移动等业者共同开发的第四代(4G)移动通信技术与标准，它是我国主导的4G国际标准。故本题正确答案为B。

单项选择题 A型题

脂肪乳剂输液中含有甘油2.5%（g/mL），它的作用是（）

A.保湿剂

B.增黏剂

C.溶媒

D.等渗调节剂

E.药物
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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
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