单项选择题

下列各项原因引起的呕吐，用氯丙嗪治疗无效的是()

A、晕动症
B、恶性肿瘤
C、发射病
D、强心苷中毒

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多项选择题

下列数据一般需要通过实验获得的是： A、黑体辐射函数 B、发射率 C、黑体辐射力 D、吸收比

单项选择题

You are moving a Windows Communication Foundation (WCF) service into production. You need to be able to monitor the health of the servicE.You only want to enable all performance counter instances exposed by the ServiceModelService counter group. Which element should you add to the system.serviceModel section in the application configuration file?（）A.<diagnostics performancecounters= ServiceOnly >B.<diagnostics performancecounters= Off wmiproviderenabled= true >C.<diagnostics performancecounters= All >D.<diagnostics wmiproviderenabled= true >

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