装修时使用涂料可能会引起机体过敏,主要是由涂料中哪种成分引起()
A.漆酚
B.VOCs
C.铅
D.铬
E.镉
参考答案:A
The new dress makes______________ pretty.
A.her look
B.her looks
C.she look
D.she looks
已知图的邻接矩阵同上题8,根据算法,则从顶点0出发,按广度优先遍历的结点序列是()
A.0243165
B.0135642
C.0123465
D.0123456