问题
单项选择题 A3/A4型题
患者，男，30岁。左下第一磨牙拔除4个月，欲行左下第一磨牙种植修复。
目前种植体材料多为（）
A.钴铬合金
B.镍铬合金
C.纯钛
D.金合金
E.银合金
答案
参考答案：C
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患者，男，30岁。左下第一磨牙拔除4个月，欲行左下第一磨牙种植修复。
目前种植体材料多为（）
A.钴铬合金
B.镍铬合金
C.纯钛
D.金合金
E.银合金
参考答案：C
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| On the first day of school, our professor introduced a little old lady called Rose to us. "Why are you in college at 1 old age?" I asked later. "I'm here to meet a rich husband, get married, have a couple of 2 , and then retire and travel. Having a college education is one of the most important 3 in my life and now I'm getting one!" she told me. We soon had no 4 and became friends. I always listened to this "time machine" as she shared 5 experiences with me. I thought she was very clever and I was 6 her intelligence (智力). At the end of the term we 7 Rose to give a talk to our football team. We were all 8 by what she taught us. When she began to give a talk, she was not as natural as she 9 is. Then she 10 her throat and began, "When you lose your dreams, you die. 11 can grow old. We should correctly 12 death. The only people that are afraid of death are those with regrets." At the year's end Rose finished the college degree. One week after graduation Rose died 13 in her sleep. Over two thousand college 14 attended her funeral to honor the wonderful woman. She told us that it's never too 15 to be all you can possibly be.
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