骨肉瘤的主要成分有下述哪些()
A．肿瘤骨
B．肿瘤性骨样组织
C．肿瘤性成骨细胞
D．肿瘤性软骨组织
E．肿瘤性纤维组织
参考答案：A, B, C
Entering the house we found him lying on the bed with his mouth _______ and eyes _______.
A．open, close
B．opened, closed
C．opened, close
D．open, closed
新嘉年华自动档车型搭载了（）变速器。
A.CVT
B.双离合
C.AMT
D.6AT
