申请丙类值班水手或值班机工适任证书者，应经过（）培训。A、组成值班水手/机工适任B、

某DNA分子中腺嘌呤的含量为15％，则胞嘧啶的含量应为（）

A.30％

B.15％

C.40％

D.35％

E.7％

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.

（）作为德育方法，也称“道德实践”、“首先练习”或“导之以行”。

A.行为训练

B.职业指导

C.心理辅导

D.榜样示范

患儿7岁，主诉左下后牙有龋洞，偶感冷热刺激疼痛，无自发疼。查：深龋洞，叩诊（-），牙龈正常。X线片示牙根发育8期，骨硬板连续。处理：去除腐质净，近中髓角发现穿髓孔，直径小于1mm，探痛，出血少，应选何种治疗方法（）。

A．活髓切断术

B．直接盖髓术

C．部分冠髓切断术

D．根尖诱导成形术

E．封金属砷后根管治疗

上肢内侧，手三阴经从尺侧向桡侧排序正确的是（）

A.手少阴心经、手厥阴心包经、手太阴肺经

B.手少阴心经、手太阴肺经、手厥阴心包经

C.手太阴肺经、手厥阴心包经、手少阴心经

D.手太阴肺经、手少阴心经、手厥阴心包经

E.手厥阴心包经、手少阴心经、手太阴肺经