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【单选题】
男性，40岁。诉刷牙时牙出血3个月余。口腔有异味。口腔检查：牙龈缘尤其是上下前牙唇侧龈缘和龈乳头暗红色，松软缺乏弹性，探诊牙龈出血，菌斑指数和牙龈指数平均为2.5，无牙袋，无松动。正确的治疗方案是A.
调颌治疗
B.
通过洁治术彻底消除菌斑和结石，并定期复查和洁治
C.
龈下刮治和根面平整
D.
牙龈切除术
E.
服用抗生素
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【简答题】请简述isArray方法的使用方式并且举例
【单选题】听力原文：W: Hello, everyone. Welcome again to Consumer's Choice, which is the last program in our present series, isn't that right? M: Yes, that's right. The story of how a listener's determination has qu...
A.
To be a keen photographer is too costly.
B.
She has to develop 10 rolls of films.
C.
All her films were vanished.
D.
After the trip, she was too tired to choose a good one.
【单选题】听力原文：W: Hello, everyone. Welcome again to Consumer's Choice, which is the last program in our present series, isn't that right? M: Yes, that's right. The story of how a listener's determination has qu...
A.
To be a keen photographer is too costly.
B.
She has to develop 10 rolls of films.
C.
All her films were vanished.
D.
After the trip, she was too tired to choose a good one.
【单选题】According to the radio program mentioned in the last paragraph, personnel officers ______.
A.
made a survey on workers' attitude toward drinking at lunchtime
B.
found that workers didn't like to be forbidden from drinking at lunchtime
C.
agreed that workers should be fired for drinking at lunchtime
D.
thought it intolerant to tell workers when they should not drink
【简答题】金属的导热系数大都随其纯度的增加而______，随其温度升高而______。
【简答题】The last program in the science series, I mean, the Origin of Life, really arouses the curiosity of me.
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