问题
单项选择题
每个案例至少有5个提问，每个提问有6～12个备选答案，其中正确答案有1个或者多个。
| 患者刘某，女，25岁，A1近中切角缺损，行烤瓷熔附金属全冠修复。 |
贵金属基底冠喷砂常用材料是
A．40目的金刚砂
B．80目的金刚砂
C．40目的氧化铝砂
D．80目的氧化铝砂
E．40目的石英砂80目的石英砂
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
每个案例至少有5个提问，每个提问有6～12个备选答案，其中正确答案有1个或者多个。
| 患者刘某，女，25岁，A1近中切角缺损，行烤瓷熔附金属全冠修复。 |
贵金属基底冠喷砂常用材料是
A．40目的金刚砂
B．80目的金刚砂
C．40目的氧化铝砂
D．80目的氧化铝砂
E．40目的石英砂80目的石英砂
参考答案：C
At least thirty times Bobby had tried to climb the snowy mountain, but he had never 46 the top. His friend old Peeper, who knew a lot about his failures, 47 Bobby to try again. He gave Bobby a pair of sunglasses and said, “If it starts clouding over, put on the glasses, or if your feet start hurting, put them on too. The glasses are very 48 . They’ll help you.” Bobby received the gift without much thought. The day came when he was to have another 49 . About two hours after he started, he felt his feet hurting. Then he 50 what Peeper had said, and put on the glasses. The pain was pretty bad, but 51 the sunglasses he could clearly see the snow-covered mountain top, so he went on. 52 , clouds were gathering. But this time Bobby could still see the 53 through the clouds. He kept climbing , leaving the clouds behind, forgetting his pain, and finally arriving at the top. It was certainly worth it. His feeling of 54 was extremely good, almost as great as that 55 view. The mountain below was surrounded (包围) by a sea of clouds. He couldn’t believe that the clouds were as thick as that, so he looked more closely at the sunglasses, and discovered the 56 . Peeper had engraved (镌刻) the snow-covered mountain top on the sunglasses, 57 Bobby could see it when he was looking upwards! Bobby __58 that the only difficulty to reaching the top had been losing 59 when he couldn’t see the mountain top. He was thankful that Peeper had used that little trick to help him see that his 60 was never impossible, and that it was still there, where it had always been.
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