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【简答题】
立体被平面截切所产生的表面交线称为 。两立体相交所产生的表面交线称为 。
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】关于肌组织的再生,下列哪项描述是错误的?
A.
肌组织的再生能力很弱
B.
横纹肌组织损伤后可以完全再生
C.
平滑肌细胞有一定的再生能力
D.
心肌细胞损伤后多由瘢痕组织修复
E.
肌组织损伤后只能由瘢痕组织修复
【单选题】Only when he left home ______ how much he loves his parents. [ ]
A.
did he know
B.
had he know
C.
he knew
D.
he had knew
【单选题】As a wise department manager, he possesses a unique way to ______ huge tasks into small and doable units.
A.
break through
B.
break away
C.
break off
D.
break down
【单选题】What did the man want to know?
A.
He wanted to know where they were.
B.
He wanted to know what was in the sky.
C.
He wanted to know why the sky was strange.
【单选题】I didn’t know the answer to the question and _________.
A.
so did he
B.
he did either
C.
neither did he
【单选题】The author did not know exactly when he was born because
A.
he did not know who his mother was.
B.
there was no written evidence of it.
C.
his master did not tell his father.
D.
nobody on his farm knew anything about it.
【简答题】—What did he say? —I don’t know what________. A．did he say B．he says C．he has said D．he said
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