问题
单项选择题
A milestone is a significant（）in a project.
A.activity
B.event
C.phase
D.process
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
A milestone is a significant（）in a project.
A.activity
B.event
C.phase
D.process
参考答案：B