下面图的杠杆中,哪一个是费力杠杆? [ ]
A.
B.
C.
D.
答案:C
“There is something wrong with my bike.” “It doesn't matter. I ___ lend you mine.”
A.am to
B.am going to
C.must
D.will
在投资项目的国民经济评价中,把由项目实现而发生的运输量,称之为( )
A.转移运输量
B.派生运输量
C.诱发运输量
D.潜在运输量