诊断食管癌简便易行的普查筛选方法是 |临床已有症状需明确食管癌诊断的检查是 A．纤

某地1992年抽样调查了100名18岁男大学生身高，均数为170.2cm，标准差为3.92cm，估计该地18岁男大学生身高在174.12cm以上者占18岁男大学生的比例为

A．5%

B．2.5%

C．0.5%

D．1%

E．15.87%

下列对本文内容的概括和分析不恰当的一项是( )。

A．张佶年少时就有志向，开始由于父祖有功而做了殿前承旨，他通晓儒家学说，向朝廷献上文章求试，结果换任国子监丞的官职
B．至道年间，任陕州通判，正好遇到夏人来侵犯边境，他率军队击败敌人；后来奉诏讨伐王均，督运军需有功而升任虞部员外郎
C．王均叛乱被平定后，张佶做了利州路转运使。后来任麟府路钤辖，他率兵迎击来犯之敌，大获全胜，受到皇帝褒奖和赏赐
D．秦州李濬暴死，马知节推荐张佶前去赴仟，于是皇帝任命他为左骐骥使，兼任秦州知府。到任后，设寨开拓疆境，边境的部族都非常怨恨

Another critical factor that plays a part in susceptibility to colds is age. A study done by the University of Michigan School of Public Health revealed particulars that seem to hold true for the general population. Infants are the most cold-ridden group, averaging more than six colds in their first year. Boys have more colds than girls up to age three. After the age of three, girls are more susceptible than boys, and teenage girls average three colds a year to boys’ two.
The general incidence of colds continues to decline into maturity. Elderly people who are in good health have as few as one or two colds annually. One exception is found among people in their twenties, especially women, who show a rise in cold infections, because people in this age group are most likely to have young children. Adults who delay having children until their thirties and forties experience the same sudden increase in cold infections.
The study also found that economics plays an important role. As income increases, the frequency at which colds are reported in the family decreases. Families with the lowest income suffer about a third more colds than families at the upper end. Lower income generally forces people to live in more cramped quarters than those typically occupied by wealthier people, and crowding increases the opportunities for the cold virus to travel from person to person. Low income may also adversely influence diet. The degree to which poor nutrition affects susceptibility to colds is not yet clearly established, but an inadequate diet is suspected of lowering resistance generally.

The phrase "people in this age group" underlined in Paragraph 2 refers to ______ .

A．infants



B．people in their twenties
C．people in their thirties and forties
D．elderly people

把数学试卷抄两遍以加深印象，这是什么技能？（）

A.阅读技能

B.记忆技能

C.操作技能

D.认知技能

Dunnett-t检验