一个木块质量为2kg,在光滑斜面上由A滑到B,如右图所示。已知AB=40cm,斜面对

题型:单项选择题

问题:

一个木块质量为2kg,在光滑斜面上由A滑到B,如右图所示。已知AB=40cm,斜面对木块支持力是17N,那么,在由A到B的过程中,重力和支持力各做功()。

A.3.92J,0J

B.0J,3.92J

C.19.6J,0J

D.0J,19.6J

考点:地方公务员行政职业能力测试上海行政职业能力测验
题型:单项选择题

看图,根据图意用比较级形式完成句子。

1. is             than .

2. is             than .

3. am t            than .

4. is n            than .

5. is o            than. .

题型:单项选择题

24—25基于以下题干:
某珠宝店被窃。经过侦破,查明作案的人就是甲、乙、丙、丁这四个人中的一个人。审讯中,四个人的口供如下:
甲:“我没作案。”
乙:“丁就是罪犯。”
丙:“乙是盗窃珠宝的罪犯,因为我亲眼看见他卖出过这种珠宝。”
丁:“乙陷害我。”

现假定这四个人的口供中,只有一个人讲的是假话。那么

A.甲是盗窃珠宝的罪犯。

B.乙是盗窃珠宝的罪犯。

C.丙是盗窃珠宝的罪犯。

D.丁是盗窃珠宝的罪犯。

题型:单项选择题

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.

题型:单项选择题

水平尺中的水准管的曲率越小,则测定水平度的精度越()。

A.大;

B.小;

C.不变;

D.不一定。

题型:单项选择题

弛张热()

A.高热持续,24小时内体温波动不超过1℃

B.24小时内体温波动超过2℃,但最低未达正常水平

C.24小时内体温波动于高热与正常体温之间

D.高热骤起、持续数日后骤退,间歇无热数日,高热重复出现

E.发热患者体温曲线无规律

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