题目内容

difficult的名词是______.

A. difficulty
B. different
C. difference
D. difficultly

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A. ussed to go;used to doing
B. used; am used to do
C. used to going; am used to do
D. used to go;am used to doing

A. with
B. by
C. for
D. up

A. 辐射式
B. 平行式（竖琴式）
C. 扇形
D. 星式

A. get up
B. give up
C. grow up
D. cut down