Had it nit been for the doctor's careful treatment,he ______till last year.
A. couldn't live
B. couldn't have lived
C. can't live
D. could live
查看答案
文案调查法对二手资料的时效性没有要求。
A. 对
B. 错
文案调查法只是为实地调查和方案设计提供帮助的。
A. 对
B. 错
实地调查与文案调查相比,更费时,费力,组织实施也更复杂,开展的成本也较高。
A. 对
B. 错