关于引导性组织再生术（GTR），叙述错误的是（）
A.窄而深的骨内袋为GTR的适应证，骨袋过宽则效果差
B.Ⅱ度根分叉病变为适应证，但需有足够的牙龈高度，以便能完全覆盖术区
C.仅涉及唇面的牙龈退缩，邻面无牙槽骨吸收且龈 * * 完好者可行GTR手术
D.膜放置时将骨缺损全部覆盖并超过缺损边缘1mm即可
E.吸烟会影响术后的愈合，应劝导患者戒烟，否则不应进行手术
参考答案：D
| 用方框中所给词语的适当形式填空，使短文正确、通顺、连贯。(每词限用一次) | |
First we took the underground to the centre of Beijing, and then 1. to the bus to the Temple of Heaven. We visited the places of 2. there and had a wonderful 3. . Then we 4. a bus to Beijing Amusement Park. We 5. hide-and-seek there. We were tired 6. we enjoyed ourselves. We went back home 7. bus and underground. Tomorrow we 8. to the World Park in Beijing. I'm very excited 9. I will see lots of great places 10. all of the world. |