绿化是指城市土地中用于园林建设的土地。

在图层调板中，下面关于背景图层说法正确的是（）

A、可以任意调整其前后顺序

B、背景层可以进行编辑

C、背景层与图层之间可以转换

D、背景层不可以关闭层眼

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.

已知FeSO₄在不同条件下分解得到的产物不同，可能是FeO和SO₃，也可能是Fe₂O₃、SO₃和SO₂。某研究小组探究在酒精喷灯加热条件下FeSO₄分解的气体产物。已知SO₃的熔点是16.8℃，沸点是44.8℃。

（1）装置Ⅱ的试管中不装任何试剂，其作用是_______________________，试管浸泡在50℃的水浴中，目的是________________________________。

（2）装置Ⅲ和装置Ⅳ的作用是探究本实验气体产物成分。请完成实验设计，填写检验试剂、预期现象与结论。

限选试剂：3 mol·L^－1 H₂SO₄、6 mol·L^－1 NaOH、0.5 mol·L^－1 BaCl₂、0.5 mol·L^－1 Ba(NO₃)₂、0.01 mol·L^－1酸性KMnO₄溶液、0.01 mol·L^－1溴水。

检验试剂	预期现象和结论
装置Ⅲ的试管中加入________________。	产生大量白色沉淀，证明气体产物中含有SO3。
装置Ⅳ的试管中加入________________。	______________________________ ______________________________ ______________________________ ______________________________

（3）装置Ⅴ的作用是防止尾气污染环境，烧杯中应加入的试剂是              。

以文字、符号、图画等记载的内容和表达的思想来证明案件事实的书面文件和其他物品称为（）

A.证据

B.书证

C.凭证

D.物证

E.凭据

简述自动TIG焊的设备？