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【单选题】
Suzhou in Jiangsu Province is more than ( ) years old.A.
1500
B.
2000
C.
3000
D.
2500
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皮皮学刷刷变学霸
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【单选题】具有同步置数功能计数器是指( )的计数器
A.
具有置数功能的计数器
B.
具有置数功能的异步型
C.
置数信号与时钟信号同时有效才能实现置数
D.
置数信号与时钟信号无关
【单选题】异步计数器是指( )的计数器。
A.
由不同类型的触发器构成
B.
各触发器时钟端连在一起,统一由系统时钟控制
C.
各级触发器状态的变化不是同时发生的
D.
触发器输出信号仅仅取决于存储电路的状态
【单选题】From the abstract, what is the conclusion of this article?
A.
Overall 10 publications with clinical trials could be identified. Their clinical outcome was compared with that laboratory bond strength studies.
B.
Clinical data provide strong evidence that air-abrasion at a moderate pressure in combination with using phosphate monomer containing primers and/or luting resins provide long-term durable bonding to glass-infiltrated alumina and zirconia ceramic under the humid and stressful oral conditions.
C.
As simple and clinically reliable bonding methods to oxide ceramics exist, the rationale for development of alternative bonding methods might be reconsidered especially when these methods are more time consuming or require rather complicated and/or technique sensitive procedures.
D.
Conducting a PubMed database search in May 2014 for articles dealing with the resin bond to dental zirconia ceramic reveals an astonishing increase of research being published in the last two decades years.
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