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【单选题】
18，48，125，252，539，( )
A.
729
B.
832
C.
922
D.
1014
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举一反三
【单选题】投掷两枚硬币，其样本空间是______。
A.
Ω=正面，反面
B.
Ω=(正面，反面)，(反面，正面)
C.
Ω=(正面，正面)，(正面，反面)，(反面，正面)，(反面，反面)
D.
Ω=(正面，正面)，(反面，反面)
【单选题】21(). A．since B．therefore C．furthermore D．forever
A.
Most worthwhile careers require some kind of specialized training Ideally, therefore, the choice of an (21) should be made even before the choice of a curriculum in high school. Actually, (22) , most people make several job choices during their working lives, (23) because of economic and industrial changes and partly to improve (24) position. The "one perfect job" does not exist. Young people should (25) enter into a broad flexible training program that will (26) them for a field of work rather than for a single (27)
B.
Unfortunately many young people have to make career plans (28) benefit of help from a (29) vocational counselor or psychologist. Knowing (30) about the occupational world, or themselves for that matter, they choose their lifework on a Mt-or-miss (31) . Some drift from job to job. Others (32) to work in which they are unhappy and (33) which they are not fitted.
C.
One common mistake is choosing an occupation for its real or imagined prestige. Too many high-school students—or their parents for them—choose the professional field, (34) both the relatively small proportion of workers in the professions and the extremely high educational and personal (35) . The imagined or real prestige of a profession or a "white-collar" job is (36) good reason for choosing it as life’s work. (37) , these occupations are not always well paid. (38) a large proportion of jobs are in mechanical and manual work, the (39) of young people should give serious (40) to these fields.
【单选题】男，55、岁，中下段食管癌长3cm，既往行胃大部切除术(Billroth Ⅰ式》，应采取下列哪种治疗
A.
食管癌切除食管胃吻合术
B.
食管癌切除结肠代食管术
C.
食管癌切除食管端端吻合术
D.
胃造瘘术
E.
空肠造瘘术
【单选题】受入境检疫的船舶，必须按照相关规定悬挂检疫信号等候查验，在卫生检疫机关发给入境检疫证前，不得降下检疫信号。昼间在明显处所悬挂国际通语信号旗“QQ”字旗表示( )。
A.
本船没有染疫，请发给入境检疫证
B.
本船有染疫或者染疫嫌疑，请即刻实施检疫
C.
本船有染疫，请进行封锁
D.
本船有染疫嫌疑，请进行实时观察
相关题目：
【单选题】投掷两枚硬币，其样本空间是______。
A.
Ω=正面，反面
B.
Ω=(正面，反面)，(反面，正面)
C.
Ω=(正面，正面)，(正面，反面)，(反面，正面)，(反面，反面)
D.
Ω=(正面，正面)，(反面，反面)
【单选题】21(). A．since B．therefore C．furthermore D．forever
A.
Most worthwhile careers require some kind of specialized training Ideally, therefore, the choice of an (21) should be made even before the choice of a curriculum in high school. Actually, (22) , most people make several job choices during their working lives, (23) because of economic and industrial changes and partly to improve (24) position. The "one perfect job" does not exist. Young people should (25) enter into a broad flexible training program that will (26) them for a field of work rather than for a single (27)
B.
Unfortunately many young people have to make career plans (28) benefit of help from a (29) vocational counselor or psychologist. Knowing (30) about the occupational world, or themselves for that matter, they choose their lifework on a Mt-or-miss (31) . Some drift from job to job. Others (32) to work in which they are unhappy and (33) which they are not fitted.
C.
One common mistake is choosing an occupation for its real or imagined prestige. Too many high-school students—or their parents for them—choose the professional field, (34) both the relatively small proportion of workers in the professions and the extremely high educational and personal (35) . The imagined or real prestige of a profession or a "white-collar" job is (36) good reason for choosing it as life’s work. (37) , these occupations are not always well paid. (38) a large proportion of jobs are in mechanical and manual work, the (39) of young people should give serious (40) to these fields.
【单选题】男，55、岁，中下段食管癌长3cm，既往行胃大部切除术(Billroth Ⅰ式》，应采取下列哪种治疗
A.
食管癌切除食管胃吻合术
B.
食管癌切除结肠代食管术
C.
食管癌切除食管端端吻合术
D.
胃造瘘术
E.
空肠造瘘术
【单选题】受入境检疫的船舶，必须按照相关规定悬挂检疫信号等候查验，在卫生检疫机关发给入境检疫证前，不得降下检疫信号。昼间在明显处所悬挂国际通语信号旗“QQ”字旗表示( )。
A.
本船没有染疫，请发给入境检疫证
B.
本船有染疫或者染疫嫌疑，请即刻实施检疫
C.
本船有染疫，请进行封锁
D.
本船有染疫嫌疑，请进行实时观察
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