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【单选题】
发动机起动、怠速及节气门( )打开时,所需较高的火花能量。A.
缓慢
B.
急剧
C.
工况变化
D.
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皮皮学刷刷变学霸
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【单选题】–What did you find in the zoo? –The animals _______ in tiny cages and they could hardly move at all.
A.
keep
B.
kept
C.
were kept
D.
were keeping
【单选题】Did you know the Earth is home to __________ animals?
A.
million
B.
millions
C.
millions of
D.
million of
【简答题】某小区由2000个家庭组成，1000家是白领家庭，1000家是蓝领家庭。每本书籍的均价为20元，白领家庭每年购书30本，蓝领家庭每年购书15本。若白领家庭对书本的需求价格弹性为－0．8，而蓝领家庭对书本的需求价格弹性为－1．2，试计算该小区对书本的需求价格弹性。
【简答题】物流仿真是借助计算机技术、网络技术和瘦削手段,采用 ___________ 方法,对物流系统进行实际模仿的一项应用技术。
【单选题】----Did you like the animals? ----____________.
A.
Yes, we didn't.
B.
No, we did.
C.
Yes, we did.
【单选题】—Did you know that the earth is the home of animals?
A.
million
B.
million of
C.
millions of
D.
millions
【单选题】Why did Uncle Andrew hate and fear animals?
A.
Because he thought they were ugly and dirty.
B.
Because he did cruel experiments on animals for years.
C.
Because most animals he saw were very big.
【简答题】经统计知，某村有电话的家庭有35家，有农用三轮车的家庭有65家，既有电话又有农用三轮车的家庭有20家，则电话和农用三轮车至少有一种的家庭数为______．
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