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【单选题】
过量空气系数α的定义为：A.
实际空气量与理论空气量之比
B.
喷气缸的燃油量与充入气缸的实际空气量之比
C.
充入气缸的实际空气量与缸内燃油完全燃烧所需的理论空气量之比
D.
1kg燃油完全燃烧所需的理论空气量与充入气缸实际空气量之比
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A.
that
B.
where
C.
there
D.
which
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A.
that; where
B.
where that
C.
which; where
D.
where; which
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【单选题】It was in that office ____ Alice once worked ____ they met each other for the first time. [ ]
A.
where; that
B.
that; that
C.
that, where
D.
where; where
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【简答题】form的method 属性取值可以为 和 post 。
【简答题】请翻译下列句子: It took several years for
the virus to break out of Congo’s dense and sparsely populated jungles but,
once it did, it marched with rebel armies through the continent’s numerous war
zones, rod...
【简答题】完形填空 It was Christmas in 1961.I was teaching in a small town where my twentyseven third graders eagerly __ 1 __ the great day of giftgiving in advance. Each day the children produced some new __ 2 __ ...
【单选题】Light pollution is a growing problem worldwide. Like other forms of pollution, light pollution degrades the quality ofthe environment.Where it was once possible to look up at the night sky and see tho...
A.
artistic appreciation.
B.
sense of physical well-being.
C.
cultural advancement.
D.
spiritual selves.
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