问题
单项选择题
X线片上,牙槽嵴高度应在()
A.牙颈缩窄处
B.牙颈缩窄处下1mm
C.釉牙骨质界处
D.釉牙骨质界下1mm
E.冠根交界部
答案
参考答案:D
X线片上,牙槽嵴高度应在()
A.牙颈缩窄处
B.牙颈缩窄处下1mm
C.釉牙骨质界处
D.釉牙骨质界下1mm
E.冠根交界部
参考答案:D
将下列句子改成否定句、一般疑问句并作肯定、否定回答。 | |
1. Lucy's friends play volleyball. _____________________________ _____________________________ _____________________________ 2. Tom is having his supper. _____________________________ _____________________________ _____________________________ 3. My uncle is good at drawing. _____________________________ _____________________________ _____________________________ 4. Their father goes to Beijing. _____________________________ _____________________________ _____________________________ 5. Kate likes tomatoes very much. _____________________________ _____________________________ _____________________________ 6. David has three nice backpacks. _____________________________ _____________________________ _____________________________ |