已知一个容量为80的样本,把它分为6组,第三组到第六组的频数分别为10,12,1

题型:填空题

问题:

已知一个容量为80的样本,把它分为6组,第三组到第六组的频数分别为10,12,14,20,第一组的频率为0.2,那么第一组的频数是(    );第二组的频率是(    )。

考点:频率分布表、频率分布直方图、频率分布折线图、茎叶图
题型:填空题

在括号里写出画线词的反义词。     

1.要是你错了,别人进攻你,你千万不要还手,只要(        )就是了。    

2.无论(        )还是酷暑,他都坚持锻炼。     

3.我相信这件事不是他做的,请你不要(        )他。     

4.在生活上我们要注意节约,反对(        )。

题型:填空题

目前,我国应用的死亡标准是()

A.心肺死亡

B.脑死亡

C.心肺与脑死亡

D.深度昏迷

E.呼吸停止标准

题型:填空题

有甲、乙、丙三药,其LD50分别为40、40、60mg/kg,ED50分别为10、20、20mg/kg,三药安全性的大小是:

A.甲=乙=丙

B.甲>乙>丙

C.甲<乙<丙

D.甲>丙>乙

题型:填空题

每台堆取料机的走行车轮有()个。

A、12

B、16

C、18

题型:填空题

However important we may regard school life to be, there is no denying the fact that children spend more time at home than in the classroom. Therefore, the great influence of parents cannot be ignored or discounted by the teacher. They can become p allies of the school personnel or they can consciously or unconsciously hinder and frustrate curricular objectives.

Administrators have been aware of the need to keep parents informed of the newer methods used in schools. Many principals have conducted workshops explaining such matters as the reading readiness program, manuscript writing and developmental mathematics.

Moreover, the classroom teacher, with the permission of the supervisors, can also play an important role in enlightening parents. The informal tea and the many interviews carried on during the year, as well as new ways of reporting pupils’ progress, can significantly aid in achieving a harmonious interplay between school and home.

To illustrate, suppose that a father has been drilling Junior in arithmetic processes night after night. In a friendly interview, the teacher can help the parent sublimate his natural paternal interest into productive channels. He might be persuaded to let Junior participate in discussing the family budget, buying the food, using a yardstick or measuring cup at home, setting the clock, calculating mileage on a trip and engaging in scores of other activities that have a mathematical basis.

If the father follows the advice, it is reasonable to assume that he will soon realize his son is making satisfactory progress in mathematics, and at the same time, enjoying the work.

Too often, however, teachers’ conferences with parents are devoted to petty accounts of children’s misdemeanors, complaints about laziness and poor work habits, and suggestion for penalties and rewards at home.

What is needed is a more creative approach in which the teacher, as a professional adviser, plants ideas in parents’ minds for the best utilization of the many hours that the child spends out of the classroom. In this way, the school and the home join forces in fostering the fullest development of youngsters’ capacities.

The central idea conveyed in the above text is that()

A.home training is more important than school training because a child spends so many hours with his parents

B. teachers can and should help parents to understand and further the objectives of the school

C. there are many ways in which the mathematics program can be implemented at home

D. parents have a responsibility to help students in doing homework

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