双曲线16kx2-ky2=16的一个焦点为(0,4)则k的值是( ) A.1716

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问题:

双曲线16kx2-ky2=16的一个焦点为(0,4)则k的值是(  )
A.
17
16
B.-
17
16
C.1D.-1
考点:双曲线的性质(顶点、范围、对称性、离心率)
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补阳还五汤的君药为()

A.黄芪

B.当归尾

C.红花

D.桃红

E.川芎

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患者男性,38岁。左耳前无痛性肿块,质软,周界不清,但可推动。偶可自行消退,但又复发,并有时大时小症状。肿块区皮肤瘙痒,逐渐加重。可见局部皮肤粗厚,有色素沉着。对于该病的治疗首选()

A.手术治疗

B.抗感染治疗

C.抗过敏治疗

D.化疗

E.放疗

题型:选择题

患者男性,22岁,下腰部疼痛,阴雨天加重近1个月,同时伴有腰部活动不便,并逐渐累及胸部。X线片示两侧骶髂关节密度增高,HLA-B27(+)

上述案例最可能的诊断结果是()

A.腰肌劳损

B.强直性脊柱炎

C.类风湿性脊柱炎

D.腰椎间盘突出症

E.化脓性脊柱炎

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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. collected B. estimated C. measured D. added

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有压洞出现有压无压交替流态,会引起()和()。

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