MRS的物理基础是() A.化学位移 B.部分容积效应 C.相位混淆 D.时间飞跃

题型:单项选择题

问题:

MRS的物理基础是()

A.化学位移

B.部分容积效应

C.相位混淆

D.时间飞跃

E.相位对比

考点:广西住院医师放射科综合复习放射科综合复习题库
题型:单项选择题

一、根据下列图文资料回答问题。

2009年全年北京市完成全社会固定资产投资4858.4亿元,比上年增长26.2%。其中,基础设施投资1462亿元,增长26%,主要投向交通运输和公共服务业,交通运输投资698.6亿元,增长15.6%,公共服务业投资434.5亿元,增长49%。

分登记注册类型看,国有内资单位完成投资2316.8亿元,比上年增长66.8%;非国有内资单位完成投资2096.4亿元,增长2.8%;外商及港澳台完成投资445.2亿元,增长5.9%。

分产业看,第一产业投资57.4亿元,增长1倍;第二产业投资411.4亿元,增长6.6%,其中工业投资406.2亿元,增长6.7%;第三产业投资4389.5亿元,增长27.8%。

分城乡看,城镇投资完成4378.2亿元,增长23.2%;农村投资完成480.2亿元,增长63.5%。

以下关于北京市全社会固定资产投资状况的说法,与资料相符的一项是()。

A.2005—2009年年均完成投资超过4000亿元

B.2008年外商及港澳台投资额超过总投资额的一成

C.2009年第一产业投资同比增长额在三次产业中最高

D.2009年第三产业投资在总投资额中的比例比上年有所下降

题型:单项选择题

呼吸衰竭引起肺性脑病的发病机制是()。

A.缺氧与酸中毒使脑血管扩张

B.缺氧和酸中毒损伤脑血管内皮细胞,引起脑间质水肿

C.缺氧致细胞ATP生成减少,影响Na+-K+泵功能而形成脑细胞水肿

D.PaCO2升高使脑血流量增加

E.脑脊液pH降低,神经细胞发生酸中毒

题型:单项选择题

进针前使用的手法有()

A.搜法

B.循法

C.按法

D.爪法

E.摇法

题型:单项选择题

下列各句中没有语病的一句是( )

A.由于加强了生产过程中的生态环境监控,该基地每年的无公害蔬菜的生产量,除供应本省主要市场外,还销往河南、河北等省。

B.滥用外来语所造成的支离破碎的语境,既破坏了汉语言文字的严谨与和谐,影响了汉语表意功能的发挥,也消解了中国文化精深而丰富的内涵。

C.山鸡椒的花、叶和果实均含芳香油,从油中提取的柠檬醛,为配制食用香精和化妆品香精的主要原料,都离不开它。

D.与作家不同的是,摄影家们把自己对山川、草木、城市、乡野的感受没有倾注于笔下,而是直接聚焦于镜头。

题型:单项选择题

Facts about Aging


The overall difference in life expectancy at birth in the United States is about 7 years (i.e.72 for men vs. 79 for women); and at every age women, on average, can expect to live longer than men. Interestingly, older women are more likely to suffer from debilitating illnesses than men. However, this difference seems to reflect the fact that women typically have less wealth and education than men - two factors that are associated with shorter life expectancies for both sexes. When the effects of poverty and education are removed in the relevant statistical analyses, these sex differences in rates of disability disappear.
The elderly generally show very high interest in associating with friends and close family members. What they show less interest in than younger adults is the expansion of their social networks to make new friends.
About one-third of problem drinkers develop their alcohol abuse problem late in life, and this problem of alcoholism among the aged is indeed more acute for women than men. Overuse of drugs may result from the tendency of some doctors to automatically prescribe drugs rather than search for underlying physical or psychological causes of symptoms, especially when the patients are elderly women. It may also reflect the fact that women are more likely to be facing the loneliness and stress associated with the loss of a spouse than men, and are generally more likely to seek help from a doctor.
Alzheimer’s disease, the much-dreaded form of dementia associated with profound memory loss and other increasingly devastating symptoms, is a condition that strikes a significant number of elderly people. Nevertheless, most elderly people will never suffer such memory loss. In fact, contemporary estimates suggest that moderate to severe memory loss is found in only 4 to 6 percent of adults over age 65. The most important point to be aware of is that while memory (especially short term memory) does deteriorate somewhat as we get older, profound memory loss is not a "natural" consequence of the aging process. It is a product of disease. Evidence of profound memory loss should prompt a visit to a physician who specializes in such problems.
after age 80 the ratio of widows to widowers in the U.S. is about 5 to 1. This statistic reflects the fact that women have a longer life expectancy than men, and the fact that women typically marry men older than themselves. Differences in wealth may also make it easier for marriage-minded widowers to find mates than widows, since elderly women are more likely to be living in poverty than elderly men.
The stereotype of depressed lonely old people is a pervasive one, but it is not supported by the facts. While social isolation is a problem for many older people, it is also a problem for many young people as well. Surveys consistently show that, in the absence of serious illness, older people generally report higher levels of happiness or life satisfaction than young people. One reason for this is that as people age they seem to devote increasing attention to the task of managing their affective states and avoiding sadness or anxiety.
Although there is considerable variability in the degree of loss, sensory decline is fairly inevitable. These losses, it should be noted, have important implications for environmental design in the care of the elderly. For example, greater use of acoustical tile to absorb background noise, use of non-slippery floor surfaces to provide additional traction, and use of non-glare surfaces and clearly marked boundaries can all increase comfort and safety.

Many elderly women face the problem of overusing drugs because
A. they believe that drugs can cure their diseases.
B. some doctors tend to let them take more drugs.
C. doctors cannot find the real causes of their diseases.
D. taking drugs is a way for them to be away from loneliness.

更多题库