()的爆炸极限为4.5%~35.8%。 A.高炉煤气 B.焦炉煤气 C.转炉煤气

题型:单项选择题

问题:

()的爆炸极限为4.5%~35.8%。

A.高炉煤气

B.焦炉煤气

C.转炉煤气

考点:材料能源行业技能考试煤气作业人员煤气作业人员题库
题型:单项选择题

9999×7778+3333×6666.

题型:单项选择题

消渴病久入络,血脉瘀滞,所以认为血瘀是消渴病的()

A.重要病机之一

B.多饮、多食、多尿、消瘦、乏力

C.肺、胃、肾

D.清热润燥,养阴生津

E.阴津亏损,燥热偏盛

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

升高体温()

A.雌激素

B.孕激素

C.雄激素

D.LH

E.FSH

题型:单项选择题

脱碳系统原始开车通过()加热溶液。

更多题库