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【单选题】
关于骨肉瘤下列哪错误的( )A.
好发于股骨下端和胫骨上端干
B.
局部肿胀、疼痛，有时表现类似急性炎症
C.
X线摄片上可见骨质破坏、骨膜下新骨形成的日光放射状阴影
D.
-经摄片诊断，应即刻行高位截肢术
E.
术前术后均应用化疗
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He thought canvas was strong enough for tents.
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He could improve canvas and make pants out of it.
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