问题
选择题
The meeting _____ for a week now.[ ]
A. has finished
B. has ended
C. has been over
D. has been in
答案
答案：C
搜题请搜索小程序“爱下问搜题”
The meeting _____ for a week now.[ ]
A. has finished
B. has ended
C. has been over
D. has been in
答案：C
缺失，铸造支架熔模制作完成后，包埋时需选用哪种材料进行熔模表面清洗，降低熔模表面张力（）
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