苹果落地受到地球4N的吸引力，苹果同时也给地球施加了______（填_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

苹果落地受到地球4N的吸引力，苹果同时也给地球施加了______（填“小于”“等于”）4N的反作用力，但由于地球的质量太大，其______很大，所以在受到苹果吸引作用下，地球的______很难改变，故苹果落地而地球不会落向苹果．

答案

苹果和地球之间的引力是相互作用力，故苹果落地受到地球4N的吸引力，苹果同时也给地球施加了等于4N的反作用力，但由于地球的质量太大，其惯性很大，所以在受到苹果吸引作用下，地球的运动状态很难改变，故苹果落地而地球不会落向苹果；

故答案为：等于，惯性，运动状态．

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. since B. so C. though D. while

单项选择题

（）级人口和计划生育行政部门，应当针对计划生育避孕药具专项经费使用情况，计划生育药具采购、管理和发放中存在的问题，及时制订和落实整改措施，依法查处有关违法违纪案件。

A.县

B.市

C.省

D.国家