当液体相对静止时,液体单位面积上所受的法向力称为()。

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问题:

当液体相对静止时,液体单位面积上所受的法向力称为()。

考点:卷烟卷接工卷烟卷接工题库
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某乡镇外出务工人员有40名,为了了解他们在某一个月内的收入情况,随意抽取的10名务工人员在这一个月的收入如下(单位:元):450,420,500,450,500,600,500,480,480,500.

(1)求这10名务工人员在这一个月内收入的众数、中位数;

(2)求这10名务工人员在这一个月内收入的平均数,并根据计算结果估计该乡镇所有外出务工人员在这一个月的总收入是多少.

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住宅专项维修资金的指导和监督工作是由()负责。

A.国务院建设主管部门

B.国务院财政部门

C.国务院建设主管部门会同国务院财政部门

D.国务院监督管理部门

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流程图就是将一个过程的步骤用图的形式表示出来的一种技术。

题型:填空题

Exercising to music pumps up brain power


If music makes you smarter, and exercise helps brain function, can exercising to music really boost brainpower Some researchers said it can. Volunteers who listened to Vivaldi’s "Four Seasons" while working out on a treadmill did much better on a test of (1) ability than when they exercised without music, a team (2) Ohio State University found.
"Evidence suggests that exercise improves the (3) performance of people with coronary artery (4) ," said psychologist Charles Emery, who led the study.
"And listening to music is (5) to enhance brainpower. We wanted to put the two results together," Emery (6) in a statement.
Writing in the latest issue of the journal Heart & Lung, Emery and (7) said they studied 33 men and women taking (8) in a cardiac rehabilitation program after having bypass (9) , angioplasty or other procedures to treat clogged arteries.
The (10) said they felt better emotionally and mentally after working out (11) or without the music. But their improvement on the (12) fluency test doubled after listening to music on the treadmills.
"Exercise seems to (13) positive changes in the nervous system, and these changes may have a (14) effect on cognitive ability," Emery said.
"Listening to music may (15) cognitive function through different pathways in the brain. The combination of music (16) exercise may stimulate and increase cognitive arousal (17) helping to organize cognitive output."
Emery said he now wanted to (18) people using music of their own choice. "We used the ’Four Seasons’ because of its (19) tempo and positive effects on medical patients in previous (20) ," Emery said. "But given the range of music preferences among patients, it’s especially important to evaluate the influence of other types of music on cognitive outcomes.\

题型:填空题

用于保证民航飞行的安全、正点、效率和经济运行服务的通信业务是:().

(A)航空移动业务

(B)航空固定业务

(C)航空通播业务

(D)航空卫星通信业务

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