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【单选题】
______ no gravity, there would be no air around the earth. heace no life.A.
If there had been
B.
If there was
C.
Had there been
D.
Were there
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【简答题】蛋白质的表观消化率
【简答题】材料消耗定额的作用是什么?
【多选题】企业定额的作用是
A.
企业定额是施工企业计算和确定工程施工成本的依据，是施工企业进行成本管理、经济核算的基础
B.
企业定额是施工企业进行工程投标、编制工程投标价格的基础和主要依据
C.
企业定额是施工企业编制施工组织设计的依据
D.
企业定额是计算工人劳动报酬的依据
E.
企业定额有利于推广先进技术
【单选题】Imagine a world in which children would be the rulers and could decide not only the outcome of each and every occurrence, but also dictate the very structure and form. of the environment. In this worl...
A.
the limits of their imagination
B.
the structure and form. of the environment
C.
the reality of life
D.
the roles of the society
【单选题】Imagine a world in which children would be the rulers and could decide not only the outcome of each and every occurrence, but also dictate the very structure and form. of the environment. In this worl...
A.
an education testing program
B.
a computer language
C.
an information dispenser
D.
an unreal world
【单选题】In which change would only van der Waals’ forces have to be overcome?
A.
evaporation of ethanol C 2 H 5 OH(l) → C 2 H 5 OH(g)
B.
melting of ice H 2 O(s) → H 2 O(l)
C.
melting of solid carbon dioxide CO 2 (s) → CO 2 (l)
D.
solidification of butane C 4 H 10 (l) → C 4 H 10 (s)
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