洋故纸的处方应付为()
A.破故纸
B.肉果
C.木蝴蝶
D.蛇蜕
E.补骨脂
参考答案:C
Malaysia Airlines Flight MH370 seemed to have been ______ to only a mystery after so long and hopeless a search.
A.reduced
B.formed
C.trapped
D.absorbed
序数为24的Cr元素,其原子外层电子排布是( )。
A.4s23d4 B.3d44s2 C.4s13d5 D.3d54s1