腭侧基托过长,不密合()
A.义齿弹跳
B.基牙敏感,咬合不适
C.义齿摘戴困难
D.支托折断,义齿下沉
E.发音不清
参考答案:E
Mr Zhou is good at ______ jokes. [ ]
A. to tell
B. tell
C. telling
D. speaking
压叠式线嘴压紧电缆后的压扁量超过电缆直径的20%为失爆。()