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【多选题】
以下属于图底反转的图片是( )。A.
B.
C.
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【简答题】如图所示，已知M是平行四边形ABCD的AB边的中点，CM交BD于点E，BD=3BE，则图中阴影部分面积与平行四边形ABCD面积之比为______．
【简答题】What do Chinese college graduates have in common with ants? The recent Ants Tribe about the lifeof some young people flock (聚集) to Beijing after university, describes the gradua...
【简答题】已知：如图所示，平行四边形ABCD的对角线AC的垂直平分线与AD、BC分别交E、F。 求证：四边形AFCE是菱形。
【简答题】已知，平行四边形ABCD和直线MN（如图所示），以直线MN为对称轴，作平行四边形ABCD经轴反射后所得的像．
【单选题】Which of the following statements is NOT true of ants?
A.
Ants know very soon that another ant is dead．
B.
When an ant is dead，others move its body out of the nest．
C.
If an ant is unconscious，it is moved out of the nest．
D.
Living ants have the“I'm dead”chemical on their bodies．
【单选题】_________ ants grow, they change their forms three times.
A.
Before
B.
As soon as
C.
While
D.
Until
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