悬浮液在旋流器中的切线速度规律是()。A、整个柱体内都随半径减小而增大B、随半径减小

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问题:

悬浮液在旋流器中的切线速度规律是()。

A、整个柱体内都随半径减小而增大

B、随半径减小而减小,在接近溢流管壁和空气柱时达最小,而后迅速增大

C、整个柱体内都随半径减小而减小

D、随半径减小而增大,在接近溢流管壁和空气柱时达最大,而后迅速减小

考点:选煤工程师重介质选煤重介质选煤题库
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(a-b+c)(-a+b-c)等于(  )

A.-(a-b+c)2

B.c2-(a-b)2

C.(a-b)2-c2

D.c2-a+b2

题型:单项选择题

取得医师资格即具有了法定的医师行业()。

A.从事医疗活动资格

B.科研、教学、医疗水平

C.业务能力

D.行医资格

E.准入资格

题型:单项选择题

黄酮类化合物的准确定义为

A.两个苯环通过三碳链相连的一类化合物
B.γ-吡喃酮
C.2-苯基色原酮
D.2-苯基苯并α-吡喃酮
E.2-苯基苯并γ-吡喃酮

题型:单项选择题

Less education, income linked to obesity in women, not men


Women who are better educated and live in households that are middle-income or above are less likely to be obese than women who are less educated and live in the lowest income households, new government research shows.
Among men, there is not a statistically significant (26) in obesity based on income and very (27) difference based on education, the data show.
(28) , about one in three U.S. adults-almost 73 million people-are obese, which is (29) 30 or more pounds over a (30) weight. Extra weight raises the (31) of diabetes, heart disease, some types of cancer and other (32) .
"There is a relationship between obesity and income, but it’s not a (33) story," says Cynthia Ogden, an epidemiologist with the National Center for Health Statistics, part of the Centers for Disease Control and Prevention.
"When looking at these two (34) of socioeconomic status-income and education-their (35) is greater on women than men," she says.
Jennifer Lovejoy, president of the Obesity Society, says that (36) -income women may be more likely to become obese because of environmental (37) such as lack of access to safe places to do physical activity and easy access to fast food.
Among the findings:
·29% of women who live in households with an annual income of $77,000 or more for a family of four are obese in opposition (38) 42% of women who live in households with an annual income below $29,000 for a family of four.
·23% of women with a college degree are obese, significantly less than the 42% of women with (39) than a high school education.
·33% of men who live in households with an annual income of $77,000 or more for a family of four are obese, (40) 29% of men who live in households with an annual income below $29,000 for a family of four are obese. This difference is not considered statistically (41) .
The analysis is based on (42) from the National Health and Nutrition Examination Survey, which is considered the gold (43) for evaluating obesity because it is a(an) (44) survey of people whose weight and height are actually (45) rather than being self-reported.

A. reliableB. poor C. informative D. significant

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相传张仲景在50岁左右的时候,曾担任过湖南长沙的太守。在这个时期内,他始终没有忘记自己是一个医生,仍然积极地为百姓诊治疾病。按照当时封建制度的规定,太守是不允许进入民间屋舍的,更不能私下随便给病人看病。为了能及时抢救病人,他想出了个主意,每逢初一和十五两天,便大开衙门,不问政事,让有病的群众进来,他坐在公堂上给病人治病。时间长了,形成了惯例,每逢初一,十五的日子,各方病人都聚集在衙门前候诊,始被人称为"坐堂大夫"。以后中药铺皆以"堂"为名,原因据说就在这里。张仲景去世后,长沙百姓在迎盘街修建了张公四祠,以表达人们对他的爱戴和怀念。这个案例反映的医德思想是()

A.为民请命

B.不畏权贵

C.精益求精

D.忠于医业

E.勇于创新

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