根据《公路工程标准施工招标文件》的规定,承包人更换项目经理应事先征得发包人同意,并应在更换()前通知发包人和监理人
A.10天
B.14天
C.21天
D.25天
参考答案:B
In the forest we observed some trees ____the leaves were black with disease.
A.where
B.of which
C.in which
D.whose
现役军人非执行任务死亡或失踪,经法定程序宣告死亡的,按照(人)对待。