[音频]Juan Martinez's neighbor helped him a lot in study.
查看答案
He passed the science class in high school so he had a chance to do a two-week nature program.
A. 对
B. 错
Now, he works for an organization that connects city kids with nature.
A. 对
B. 错
4.按《招标投标法》规定，招标文件自发放之日起，至投标截止时间的期限，最短不得少于（ ）天。
A. 15
B. 20
C. 30
D. 45
7.（）哪种方法适用于采用单价合同的项目
A. 工程量增加的报高价
B. 前高后低
C. 量大价高的提高报价
D. 工程内容不明确的报低价
微信支付 
支付宝支付