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问题 单项选择题

在离心泵的特性曲线图中，随着流量的增加，泵的吸上真空度（）。

A.一直上升

B.一直下降

C.先升后降

D.先降后升

答案

参考答案：A

单项选择题

某男性患者，16岁，主诉：刷牙牙龈出血3个月余，伴牙龈肿胀。检查：上前牙牙龈边缘及牙龈 * * 充血、发亮、呈鲜红色，肿胀明显，龈 * * 呈球状突起，仅龈缘有少量菌斑堆积，上唇稍短。试分析造成此患者牙龈炎症较重的原因，除外（）

A.菌斑

B.口呼吸

C.舔唇习惯

D.开唇露齿

E.激素水平
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填空题

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. exclusive B. extensive C. publicD. proper
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