金属拉伸试验过程中,在弹性范围和直至上屈服强度,试验机的夹头分离速率应尽可能保持恒定,应力速率范围:E<150000(N/mm2),在()。
A. 6—60(N/mm2)/s
B. (6—60)kN/s
C. 2—20(N/mm2)/s
D. (2—20)kN/s
查看答案
肾脏损伤大多数病人需要()
A. 手术治疗
B. 非手术治疗
C. 酸化尿液
D. 抗感染治
E. 卧床休息
医疗器械经营企业应当采取有效措施,确保医疗器械运输、贮存过程符合医疗器械说明书或者标签标示要求,并做好相应记录,保证医疗器械质量安全。
A. 正确
B. 错误
You are developing a Windows Communication Foundation (WCF) service.One of the service operations contains the following code.private static int counter = 0;[OperationContract]public void IncrementCount(){ counter++;}You need to set a service behavior that prevents two or more threads from incrementing the counter variable at the same time. Which code segment should you use to set the service behavior?()
A. [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Single)]
B. [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Single)]
C. [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)]
D. [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Reentrant)]