第26题: [单项选择]s_x表示的是:() A. 总体中各样本均数分布的离散情况 B. 样本均数与样本均数之差 C. 以上都不是 D. 样本内实测值与总体均数之差 E. 表示某随机样本的抽样误差 参考答案:E
第27题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. The radio batteries have been replaced. B. The radio is somewhere else. C. They don’t really need to hear the radio. D. They should get a new radio. 参考答案:D 答案解析:[听力原文]
W: We really need to replace the batteries in that radio.
M: Why not the entire radio
Q:
第28题:[单选题]预防急性低血压反应,哪些护理措施不妥 A. 出现头晕、恶心、乏力时立即平卧,取头低足高位 B. 避免突然改变体位 C. 卧床服降压药 D. 服药后不要站立太久 E. 避免用过热的水洗澡或蒸汽浴 参考答案:C