如图所示，甲、乙、丙是三个演示实验的示意图，甲图表示的是将接_爱下问搜题

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问题问答题

如图所示，甲、乙、丙是三个演示实验的示意图，甲图表示的是将接触面被削平的两个铅块用力压紧，可以使它们结合在一起，即便在下端悬挂一定质量的重物也不分开．乙图表示的是在一个配有活塞的厚壁玻璃筒中放一小团硝化棉，迅速向下压活塞，硝化棉燃烧起来．丙图表示的是先用玻璃板隔开一瓶空气和一瓶二氧化氮气体，当抽去中间玻璃板后，过一会儿下方玻璃杯中的二氧化氮气体颜色变浅，上方玻璃杯中的空气颜色变深．甲图的演示说明分子之间存在相互作用的______力（选填“引”或“斥”）；乙图的演示说明外界对气体做功，其内能______（选填“增大”或“减小”）．丙图演示的气体分子的______现象．

答案

（1）甲图将接触面被削平的两个铅块用力压紧，可以使它们结合在一起，即便在下端悬挂一定质量的重物也不分开，说明了分子间存在引力；

（2）乙图在一个配有活塞的厚壁玻璃筒中放一小团硝化棉，迅速向下压活塞，硝化棉燃烧起来，是做功增加了棉花的内能；

（3）丙图先用玻璃板隔开一瓶空气和一瓶二氧化氮气体，当抽去中间玻璃板后，过一会儿下方玻璃杯中的二氧化氮气体颜色变浅，上方玻璃杯中的空气颜色变深，是扩散现象，说明了分子在不停地做无规则运动．

故答案为：引；增大；扩散．

单项选择题 A3/A4型题

男性，38岁，突然出现上腹部剧烈疼痛波及全腹，患者面色苍白，出冷汗，全腹压痛并反跳痛、肌紧张。

应进行下述哪些治疗（）

A.密切观察病情，有感染征象时可手术探查

B.立即剖腹探查

C.适当应用抗生素及生长抑素类制剂

D.大剂量应用抗生素

E.禁食，胃肠减压

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.