计算平均比率最适宜的方法是() A.算术均值 B.调和均值 C.几何均值 D.众数和

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问题:

计算平均比率最适宜的方法是()

A.算术均值

B.调和均值

C.几何均值

D.众数和中位数

考点:统计学原理统计学原理题库
题型:单项选择题

铅球从运动员手中掷出后仍在空中继续飞行,是由于铅球具有______,但它最后又落回地面,这是由于铅球受到______作用,表明力可以改变物体的______.

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周围神经损伤后其丧失的功能要获得恢复,需要具备以下哪些要素()

A.细胞体功能恢复 

B.传导通路功能恢复 

C.神经肌肉接头功能恢复 

D.以上均是

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如何区分终端与台区总表接口故障?

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It’s never too early or too late for a parent to become a teacher. In this age of teacher accountability, endless school testing, increased pressure and competition, and the proliferation of "educational" toys, too many people forget that success begins at home.

Freeman A. Hrabowski Ⅲ, president of the University of Maryland, Baltimore County, and co-author of Beating the Odds: Raising Academically Successful African American Males and Overcoming the Odds: Raising Academically Successful African American Young Women, says that in the interviews he and his co-authors conducted, the overwhelming factor in their children’s academic achievement was that parents inspired and envisioned their children’s success. They thought and talked about what would be required to have a .successful child.

"It just makes such a difference when there’s someone in that house working to relate to that child and inspire that child," Hrabowski says. "These parents (of the high achievers discussed) are really inspirational in their commitment to their children."

Professor Barbara T. Bowman, one of the faculty founders of Chicago’s Erikson Institute, an independent institution of higher education that prepares child development professionals for leader- ship, says that Black children must learn in two different cultures-the African-American culture in which they live and the mainstream culture on which school and education are based.

Bowman also says the relationship between children and their parents is critical. "It is the early responsive ness of the caregiver to the infant’s behavior that creates a sense of well-being and optimism that affects the child’s interest in learning," says Bowman, who served as president of the institute from 1994 to last year. "Children who like and want to please the adult learn better what the adult wants them to learn."

In this day of highly competitive testing and the stress of getting high SAT or ACT scores, it’s important also to avoid pressuring or overexposing your child. Your son or daughter is probably already facing stress at school and on the playground. Your role is to help him or her relieve and manage that stress. Help them to understand that life does not end or begin with a test. And while academic success is important, it’s also important to keep everything in perspective. Failure is a relative term in the grand scheme of things. If your child did poorly on a test, but answered a particularly tough question correctly, stress the positive. On the other hand, if schoolwork comes too easily to your child, find other ways to challenge him or her so they understand that life won’t always be that way.

It can be inferred from the passage that the African-American culture is ()

A. an important part of the mainstream culture

B. the base of the mainstream culture

C. different in many ways from the mainstream culture

D. dependant on the mainstream culture

题型:单项选择题

IMEP和合作单位统一管理平台用户名和密码的管理:加强管理以有利于系统的安全运行,同时提高了公司相关信息的()。代维人员取得系统帐户后,应及时登录系统,检查功能是否完善,并立即()。要求密码至少为6-8位,且要求是字母与数字共存。

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