试题与答案

通过调整计划安排以满足资源限制条件并使工期延长最少的优化是( )。A.工期固定—资

题型:单项选择题

题目:

通过调整计划安排以满足资源限制条件并使工期延长最少的优化是( )。

A.工期固定—资源均衡的优化

B.费用优化

C.资源有限—工期最短的优化

D.工期优化

答案:

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参考答案:解析:外商投资旅行社的外国旅游经营者应当符合下列条件: (1)是旅行社或者主要从事旅游经营业务的企业; (2)年旅游经营总额4000万美元以上; (3)是本国旅游行业协会的会员。

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In the dining room of my grandfather’ s house stood his heavy clock. Meals in the dining room were a (21) for our four generations to become one. My grandfather’ s clock always stood like a trusted old family friend, (22) us playing jokes and tellingstories, which was already a (23) of our life.

When I was a child, the old clock interested me. I watched and listened to it during (24) I was surprised how at (25) times of the day, the clock would strike three times, six times or more, with a wonderful great (26) that echoed throughout the house. The clock chimed year after year, a part of my (27) , a part of my heart.

Even more (28) to me was my grandfather’s special action each day. He meticulously (29) the clock with a special key each day. The key was magic to me. It (30) our family’ s magnificent clock ticking and striking all year round.

26()

A.seeing 

B.hearing 

C.watching 

D.looking

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A.火箭尾部向外喷气,喷出的气体对火箭产生一个反作用力,从而使火箭获得向上的推力

B.火箭的推力是由于喷出的气体对空气产生一个作用力,空气的反作用力作用于火箭而产生的

C.火箭飞出大气层后,由于没有空气,火箭虽向后喷气,但不会产生推力

D.飞船进入轨道后与地球间存在一对作用力和反作用力

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