1. 下列哪些是交通需求预测的常用软件?
AutoCAD
B. VISUM
C. Vissim
D. TransCAD
Please wait for a minute the green light isn't on.
A. if
B. unless
C. but
D. after
you can't come tomorrow, we can hold the party a little late.
A. Or
But
C. For
D. If
We will have no water to drink we don't protect the earth.
A. if
B. until
C. before
D. though