企业定额是指由施工企业根据自身具体情况,参照()定额的水平制定的。 A.企业 B.国

题型:单项选择题

问题:

企业定额是指由施工企业根据自身具体情况,参照()定额的水平制定的。

A.企业

B.国家

C.部门

D.部门或地区

考点:材料员材料员专业基础知识材料员专业基础知识题库
题型:单项选择题

在下面分别画一对平行线和一对相互垂直的直线.

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在用直流电动机提升重物的装置中,重物的重力G=500N,电源的输出电压恒为110V,当电动机向上以v=1.0m/s的恒定速度提升重物时,电路中的电流强度I=5.0A,若不计各处摩擦,可以判断(  )

A.电动机消耗的总功率为550W

B.电机线圈的电阻为2Ω

C.提升重物消耗的功率为100W

D.电机线圈的电阻为4Ω

题型:单项选择题

男性,26岁,突然出现阵发性抽搐,历时2分钟,自然缓解,抽搐从一侧手指开始向腕部、臂部、肩部、下肢扩散,神志始终清楚。诊断最可能的是()。

A.大发作

B.精神运动性发作

C.小发作

D.Jackson发作

E.感觉性发作

题型:单项选择题

Looking back on my childhood, I am convinced (1) naturalists are born and not made. Although we were all brought (2) in the same way, my brothers and sisters soon gave up their pressed flowers and insects. (3) them, I had no ear (4) music and languages, I was not an early reader and I could not do mental arithmetic.Before World War I we (5) our summer holidays in Hungary. I have only the memory of the house we lived (6) , of my room and my toys. I can hardly (7) clearly the large family of grandparents, aunts, uncles and cousins who gathered (8) door. But I do have a clear memory of the dogs, the farm (9) , the local birds and, (10) all, the insects.I am a (11) , not a scientist. I have a p (12) of the natural world, and my enthusiasm has led me into varied investigation. I love discussing my favorite topics and enjoy (13)  the midnight oil  (14)  reading about other people’s observations and discoveries. Then  (15)  happens that brings these observations together  (16)  my conscious mind. Suddenly you fancy (想象), you see the answer  (17)  the riddle, and books, of which some might honor with the title of scientific research.But curiosity, a keen eye, a good memory and enjoyment of the animal and plant world do not make a scientist; one of the outstanding and essential  (18)  required is self-discipline, a quality I lack. A scientist requires not only  (19)  but also hard training, determination and a goal. A scientist, up to a point, can be made. A naturalist is  (20) . If you can combine the two, you get the best of both worlds.

 

第(3)空应选择()

A.Unlike

B.Like

C.With

D.Against

题型:单项选择题

物流中心在形成发展过程有以下的特点()。

A.人力资源迅速聚集

B.主导产业迅速形成

C.交通便利

D.资金迅速聚集

E.本地居民大量迁移

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