问题
选择题
_____ the pain was bad, _____he did not complain.
A．Although, but
B．Though, but
C．Though, yet
D．Even, still
答案
答案：C
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_____ the pain was bad, _____he did not complain.
A．Although, but
B．Though, but
C．Though, yet
D．Even, still
答案：C
全金属冠桥蜡型后，将蜡型从工作模上取下，固定在成形座上，直接将铸圈放好，固定，2h后先倒包埋料后倒液，真空搅拌后，用毛笔将蜡型内外涂上一层，再把整铸圈注满。
、
的邻接关系不好，且变形
变低