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3 个彼此作平面平行运动的构件共有 个速度瞬心,这几个瞬心必位于 。含有6个构件的平面机构,其速度瞬心共有 个,其中 个是绝对瞬心,有 个相对瞬心。
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【单选题】根据材料回答{TSE}题: Going on a Diet A typical person needs about l,800 calories per day to stay alive.These calories keep your heart___________ (51)and your lungs breathing.They keep your organs operating__...
A.
jumping
B.
turning
C.
beating
D.
kicking
【简答题】Fill in the blanks in the summary of Passage A with appropriate words according to your understanding of the passage. The best way to achieve the most happiness in life is being 1_________. According ...
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A.
jumping
B.
turning
C.
beating
D.
kicking
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A.
jumping
B.
turning
C.
beating
D.
kicking
【多选题】国际商法的主要特点是( )
A.
技术性
B.
统一性
C.
迅捷性
D.
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【单选题】4单选题:影响植物生长的水分状态主要包括土壤水分和( )
A.
A空气湿度
B.
B毛管水
C.
C悬着水
D.
D膜状水
【简答题】国际商法是调整 和 的各种关系的法律规范的总和。 2 、国际商法的两个重要渊源是 和 。 3 、大陆法强调 的作用,它在结构上强调 、 、 和 。 4 、大陆法系各国把法分为 和 两大部分。 5 、美国法律分为 和 两大部分,这是美国法律结构上的一个主要特点。
【简答题】The best way to achieve the most ______ in life is being ______. According to researchers, a person needs about 6 hours of socializing for a ______ day and people should take part in __________ to imp...
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