单例模式属于对象创建型模式,它保证一个类仅有()。
A. 一个属性
B. 一个操作
C. 一个实例
D. 一个对象成员
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国际私法的核心任务就是要解决涉外民事关系中的法律适用问题。
A. 正确
B. 错误
取两个试验结果的算术平均值作为砂浆的含水率,精确至±()。
在代理财政授权支付业务中,一定要核对预算单位是否在用款额度内支付,不允许出现超额度支付现象。()
A. 正确
B. 错误
You have a Web server that runs Windows Server 2003 Service Pack 2 (SP2).You attempt to start the World Wide Publishing Service and receive the following error message.You need to identify which services must be started before you can start the World Wide Web Publishing Service. What should you do?()
A. From Event Viewer, view the application log.
B. From Windows Explorer, open the %systemroot%\system32\drivers\etc\services file.
C. From the Services snap-in, view the properties of the World Wide Web Publishing Service.
D. From the command prompt, run Net config server /srvcomment:”World Wide Web Publishing Service”.