导线外业工作包括(),量边,()三项工作。
参考答案:选点、测角
已知二次不等式ax2+bx+c>0的解集为{x|-1<x<2},求cx2-bx+a>0的解集。
His first book ______ next month is based on a true story.
A.published
B.to be published
C.to publish
D.being published