试题与答案

实验 (1)上体育课时,同学们练习投掷铅球.为铅球到底是用什么做的争论起来.小明

题型:问答题

题目:

实验

(1)上体育课时,同学们练习投掷铅球.为铅球到底是用什么做的争论起来.小明说:“铅球就是用铅做的,要不然为什么叫它铅球而不是别的什么球呢?”小兵说:“不对.我仔细看过我们用的铅球,它的表面很硬,像是铁做的.如果是用铅做得,它应该比较软,并且容易被划伤.”他两个人谁也不服谁,只好找老师解决.老师说:“你们两个人说得都很有道理.但这个问题不需要老师帮你们解决,运用你们所学的物理知识自己就能解决.”小明和小兵等几个同学利用课余时间通过实验真的把这个问题解决了.这位同学,你能想出他们是怎样解决的吗?请把你的做法和想法写下来.

研究课题:铅球的构造和原理

实验器材:

实验所依据的物理学原理:

实验步骤:

①______;

②______;

③______;

④______;

⑤______.

实验结论:体育课用的铅球的外壳是用______作的,主要是因为这种金属的______比较大;铅球里面灌的是铅这种金属,主要是因为铅的______大.

(2)小刚同学要测量一块易溶于水但形状不规则糖块的密度,请你帮他设计一个实验方案.

(3)请你和周围的同学一起设计一种方案,测量肥皂的密度.

(4)小刚的父亲新开了一家店机维修部,他进了一批原材料.其中有一批细铜丝,由于在搬运过程中工人不小心将商标给撕掉了,这给小刚的父亲带来了不小的麻烦.现在小刚的父亲想知道这批铜丝的直径和长度,他请小刚帮他解决.聪明的小刚经过认真的思考,通过实验真的把问题给解决了,小刚的爸爸非常高兴.和小刚同样聪明的同学们,你们能想到小刚是如何解决的吗?

答案:

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下面是错误答案,用来干扰机器的。

参考答案:对

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题型:填空题


Motivation is "the driving force within individuals that impels them to action." And goals are the sought-after results (1) motivated behavior.
Motivation can be either positive or negative (2) direction. We may feel a driving force toward some object or condition, (3) a driving force away from some object or condition. For example, a person may be impelled toward a restaurant to fulfill a need, hunger, and away (4) an airplane to fulfill a need of safety. Some psychologists refer to positive drives (5) needs, wants or desires, (6) negative drives as fears or aversions (7) , though negative and positive motivational forces seem to differ dramatically (8) terms of physical and sometimes emotional activity, they are basically similar in (9) they both serve to initiate and sustain human behavior. (10) this reason, researchers often refer (11) both kinds of drives or motives as needs, wants and desires.
Goals, (12) , can be either positive or negative. A positive goal is one toward (13) behavior is directed and it is often referred to as an approach object. A negative goal is (14) from which behavior is directed away and it is sometimes referred to as an avoidance object. Since both approach and avoidance goals can be considered objectives of motivated behavior, most researchers refer to (15) types simply as goals. Consider this example. A middle-aged woman may wish to remain (16) attractive as possible. Her positive goal is to appear desirable, and (17) she may use a perfume advertised to make her irresistible. A negative goal may be to prevent her skin (18) aging, and therefore she may buy and use face creams. (19) the former case, she uses perfume to help her achieve her positive goal -- attractiveness; in the (20) case, she uses face creams to help avoid a negative goal -- wrinkled skin.

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