卡瓦使用前，要检查铰链销钉、垫圈、开口销，保证（）。
A.活动灵活
B.完好无损
C.润滑
D.型号
参考答案：B
–Did you go to Jufeng Temple ___ the Peach Blossom Festival(桃花节)？
--Yes. The flowers were beautiful and bees were flying ____ them.
A．during, among
B．during, between
C．through, among
D．through, between
恃许经营项目融资招标的( )是招标人评价和选择投标人的关键因素。
A．投标报价
B．技术和管理方案
C．融资方案
D．项目协议响应方案
