题目内容

Have you painted this room recently? Everything's looking ______ before.

A. brighter than
B. brightest than
C. as bright as
D. so bright as

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Greenland, ________ island in the word, covers over two million square kilometers.

A. it is the largest
B. that is the largest
C. is the largest
D. the largest

Ann doesn't work ____ she used to.

A. hard than
B. as harder as
C. as hard as
D. more harder than

若向量组 a , b , g 线性无关, a , b , d 线性相关, 则( ).

A. a 必可由 b , g , d 线性表示
B. b 必不可由 a , g , d 线性表示
C. d 必可由 a , b , g 线性表示
D. d 必不可由 a , b , g 线性表示

若一组向量的和为零向量,则它们必线性相关. ( )

A. 对
B. 错