我国新疆天山和昆仑山脉之间的绿洲属于（） A．垂直地带性现象 B．纬度地带性因素 发布时间：2017-06-01 20:57 │ 来源：www.tikuol.com 题型：选择题 问题： 我国新疆天山和昆仑山脉之间的绿洲属于 （ ）A．垂直地带性现象B．纬度地带性因素的影响C．地方性分异规律D．干湿度地带性规律
题型：选择题 筛检的定义是A．对某个人群的全部人员进行调查B．在大量人群中通过快速的诊断试验确诊病人的过程C．在某个人群中随机抽取一部分人进行检查的过程D．在大量人群中通过快速的试验或其他方法确诊病人的过程E．在大量人群中通过快速的试验和其他方法，去发现那些未被识别的病人、可疑病人或有缺陷的人 查看答案
题型：选择题 以下关于单位设置叙述正确的是（）。A.可以通过［重缩放世界单位（RescaleWorldUnits）］来更改系统的单位设置。B.不可以自定义显示单位比例。C.主栅格单位随系统单位中的设置更改而更改。D.［单位设置（UnitsSetup）］中［公制（MetriC.］的最小选择为毫米（mm）。 查看答案
题型：选择题 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 word "cramped" underlined in Paragraph 3 most probably means ______ .A．cheapB．crowdedC．depressingD．simple 查看答案