在同一总体中随机抽样,下列情形中,样本均数可靠的是() A.S小 B.S小 C.S大 发布时间:2017-04-16 20:44 │ 来源:www.tikuol.com 题型:单项选择题 A1型题 问题: 在同一总体中随机抽样,下列情形中,样本均数可靠的是()A.S小B.S小C.S大D.n小E.CV小
题型:单项选择题 A1型题 下列化合物既与硫酸反应,又与氢氧化钠反应的是[ ]①NaHCO3 ②NaHSO4 ③(NH4)2S④NaNO3 ⑤Al(OH)3 A.只有① B.只有③ C.①②③ D.①③⑤ 查看答案
题型:单项选择题 A1型题 Once you have established the daily ration of drinking water in a survival situation,how should you drink it?()A.Small sips at regular intervals during the dayB.The complete daily ration at one time during the dayC.One-third the daily ration three times dailyD.Small sips only after sunset 查看答案