如果关井，当气柱运行至上部和接近井口附近时，井口压力（）。 A.增加 B.减小 C.

如图所示，一物体放在水平地面上，在拉力F₁和F₂的作用下做匀速直线运动．关于F₁和F₂的大小关系，下列说法正确的是（　　）

A．F₁＞F₂

B．F₁=F₂

C．F₁＜F₂

D．以上情况都有可能

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.

一定条件下存在反应：CO(g)+H₂O(g)CO₂(g)+H₂(g)，其正反应放热。现有三个相同的2L恒容绝热(与外界没有热量交换) 密闭容器Ⅰ、Ⅱ、Ⅲ，在Ⅰ中充入1 mol CO和1 mol H₂O，在Ⅱ中充入1 mol CO₂和1 mol H₂，在Ⅲ中充入2 mol CO 和2 mol H₂O，700℃条件下开始反应。达到平衡时，下列说法正确的是（   ）

A．容器Ⅰ、Ⅱ中正反应速率相同

B．容器Ⅰ、Ⅲ中反应的平衡常数相同

C．容器Ⅰ中CO 的物质的量比容器Ⅱ中的多

D．容器Ⅰ中CO 的转化率与容器Ⅱ中CO₂的转化率之和小于1

漂浮导管直接监测的指标包括（）

A.PAP

B.RAP

C.CI

D.PAWP

E.以上都不是

女患者，28岁，带下量多1周，色黄白，质粘腻，味臭，阴痒，纳呆，胸闷口腻，苔黄腻，脉濡数，治疗最佳方剂是（）

A.内补丸

B.易黄汤

C.完带汤

D.知柏地黄汤

E.止带方