在抽样调查中,关于样本大小影响因素的说法正确的是() A.对调查结果的精确性越低,样

题型:单项选择题 A1型题

问题:

在抽样调查中,关于样本大小影响因素的说法正确的是()

A.对调查结果的精确性越低,样本量就越大

B.估计现患率或阳性率越接近50%,则样本量越大

C.所规定允许犯一类错误的概率(α)越低,则样本量越大

D.所选抽样方法的抽样误差越小,则样本量应加大

E.所选抽样方法随中心误差越大,则样本量越大

考点:职业卫生主治医师职业卫生基础知识综合练习职业卫生基础知识综合练习题库
题型:单项选择题 A1型题

以下疾病是由珠蛋白合成障碍所致的是().

A.遗传性球形细胞增多症

B.血红蛋白H病

C.遗传性棘形细胞增多症

D.自身免疫性溶血性贫血

E.再生障碍性贫血

题型:单项选择题 A1型题

金银花的主要药理作用有()

A.抗菌

B.抗病毒

C.抗内毒素

D.抗炎

E.解热

题型:单项选择题 A1型题

农户占用田间路、沟渠等耕种的能否确权?

题型:单项选择题 A1型题

在有关楼梯扶手的规定中,下列何者不正确()

A.室内楼梯扶手高度自踏步面中心量至扶手顶面不宜小于0.9m

B.室内楼梯扶手平台处长度超过500mm时,其高度不应小于1m

C.梯段净宽达三股人流时,应两侧设扶手

D.梯段净宽达四股人流时,应加设中间扶手

题型:单项选择题 A1型题

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.

We may infer that the writer of the article does not favor()

A.suggestions by the teacher to a parent in regard to improving the student’s scholastic average

B. written communications to the parent from the teacher

C. having the parent observe lessons which the children are being taught

D. principal-parent conferences rather than teacher-parent conferences

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