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【单选题】
下列对心脏黏液瘤的概述中，不正确的是A.
位于左心房最多，其次为右心房，心房间隔卵圆窝是好发部位
B.
起源于心内膜下的间叶细胞，半透明、晶莹胶冻样，质脆易碎
C.
黏液瘤属良性，不发生恶变
D.
呈息肉样肿块突人心腔，瘤蒂附着于房间隔或心房壁，影响正常血流
E.
左心房黏液瘤常造成二尖瓣瓣口梗阻，产生二尖瓣狭窄或关闭不全
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【单选题】---It’s 12 April today. Have they found any useful information about the plane's black box? ---Flight MH370? Yes, but it’s difficult to decide where the black box really is.
A.
still
B.
ever
C.
yet
D.
never
【简答题】Many animals can (judge) directions by smelling.
【简答题】某房屋基础平面图、断面图如下图所示,求 该 房屋人工土方的工程量。 (土壤类别为一、二类土; C10素砼垫层;C20钢筋砼基础 )
【简答题】Many animals can (judge) direction by smelling.
【单选题】Many animals can make circus act together not because ______.
A.
they become interested in the act
B.
they can receive praise and food after the act
C.
they become accustomed to each other
D.
they are not the natural enemies
【简答题】Many animals can maintain constant conditions in their interval
environment.A. relate B. relative C. relativity D. relatively
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