设A为3阶方阵,且行列式|A|=1,则|-2A|之值为( )。
A.8 B.6C.-6 D.-8
参考答案:D
With two extra floors built, this hotel can ________ more people than before.
A.appreciate
B.abandon
C.accommodate
D.approach
致密结缔组织的特点是()
A.纤维成分多,且排列紧密
B.细胞成分少
C.基质成分少
D.有少量小血管和淋巴管
E.以上均是