题目内容

我国行业标准规定,切花的质量分为几级,分级指标主要有()、花形花色、花茎长度与花朵直径、叶片状态、病虫害与损伤等。

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You are developing a Windows Communication Foundation (WCF) service to provide an in-memory cache for many Web applications.The service contract is defined as follows. (Line numbers are included for reference only.) 01 [ServiceContract] 02 public interface IDataCache 03 { 04 ... 05 }06 07 08 public class DataCache : IDataCache 09 { 10 ... 11 } You need to ensure that all users share the cache. Which code segment should you insert at line 07?()

A. [ServiceBehavior(TransactionIsolationLevel = IsolationLevel.RepeatableRead)]
B. [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
C. [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession)]
D. [ServiceBehavior(TransactionIsolationLevel = IsolationLevel.ReadComitted)]

口疳是由于()

A. 心火上炎
B. 肝血不足
C. 阳气虚衰
D. 肺气失宣
E. 脾气虚弱

CT 机属于()设备。

男孩,2岁,胸骨左缘第3~4肋间闻及连续性杂音,肺动脉第二音增强,股动脉有枪击音,脉压差增大,最可能的是()

A. 房间隔缺损
B. 室间隔缺损
C. 法洛四联症
D. 急性心包炎
E. 动脉导管未闭

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