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【单选题】
属于嵌体适应证的是( )
A.
青少年的恒牙和儿童乳牙
B.
禾面缺损范围小且表浅
C.
固定桥的基牙已有洞或需要放置栓体附着体
D.
牙体缺损范围大,残留牙体组织抗力形差,固位不良
E.
对美观及长期效果要求高的前牙缺损年轻患者
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【简答题】《新标准》对1-2年级音乐体裁与形式提出的标准是什么?
【单选题】铝锂合金中锂的含量范围是多少?
A.
1.1%~1.8%
B.
1.1%~2.8%
C.
1.1%~3.8%
D.
2.1%~3.8%
【单选题】铝锂合金中锂的含量范围是多少?( )
A.
1.1%~1.8%
B.
1.1%~2.8%
C.
1.1%~3.8%
【单选题】Annealing can make metal
A.
hard and tough( 韧 )
B.
hard but brittle
C.
soft but tough
D.
soft and brittle
【单选题】铝锂合金中锂的含量范围是多少?
A.
1.1%~2.8%
B.
1.1%~1.8%
C.
2.1%~3.8%
D.
1.1%~3.8%
【简答题】What is the annealing heat treatment for steel and what are its purposes?
【简答题】Annealing is a way of metal softer by heating it and then letting it cool very slowly. If metal is heated and then cooled very quickly, for example by dipping (浸) it in water, it will be very h...
【单选题】At what temperature do annealing of DNA and primer takes place? ____________
A.
42˚
B.
54˚
C.
74˚
D.
96˚
【简答题】The process annealing used to and increase the ductility of a previously strain-hardened metal.
【简答题】Annealing is a way of metal softer by heating it and then letting it cool very slowly. If metal is heated and then cooled very quickly , for example by dipping it in water , it will be very har...
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