问题
单项选择题
PFM冠上釉时的炉温是
A．与体瓷的烧结温度相同
B．低于体瓷烧结温度6～8℃
C．低于体瓷烧结温度10～20℃
D．高于体瓷烧结温度6～8℃
E．高于体瓷烧结温度10～20℃
答案
参考答案：B
解析：低于体瓷烧结温度6～80℃，以保证体瓷不变形。
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PFM冠上釉时的炉温是
A．与体瓷的烧结温度相同
B．低于体瓷烧结温度6～8℃
C．低于体瓷烧结温度10～20℃
D．高于体瓷烧结温度6～8℃
E．高于体瓷烧结温度10～20℃
参考答案：B
解析：低于体瓷烧结温度6～80℃，以保证体瓷不变形。
根据短文内容，从下面方框中选择适当的单词或词组填空，使短文内容完整正确。
The “ambu-bus” will 小题3:carry 18 patients and will be adapted (改装) to have 小题4:features(特征). Officials say it will be very useful if they are ever faced with a major disaster. It will also be 小题5:building a new ambulance. Danny Davis, an official on the Kentucky board of education (学校董事会), said, “I’m a strong believer in school-community relations (关系) and I think this would be a very good thing for us to do.” |