层次分析法特别适宜于具有()的目标系统,而且目标值又难以定量描述的决策问题。
参考答案:分层交错
I go to school by _______, but my best friend goes there ______foot.
A.a bike; by
B.bikes; on
C.bike; on
D.bike; by
:_____________________________ :.
A.
B.
C.
D.