筒冠内冠试戴时就位后龈缘发白,最有可能的原因是()
A.有悬突
B.内冠颈缘过长
C.内冠不密合
D.内冠变形
E.以上都不是
参考答案:B
35. The plant is dead. I ______it more water.
A.will give
B.would have been
C.must give
D.should have given
夫妻沟通技巧的咨询要点,有哪些?