有四个自然数A、 B、 C、D,它们的和不超过400,并且A除以B商是5余5,A除以C商 发布时间:2018-03-08 15:37 │ 来源:www.tikuol.com 题型:单项选择题 问题: 有四个自然数A、B、C、D,它们的和不超过400,并且A除以B商是5余5,A除以C商是6余6,A除以D商是7余7。那么,这四个自然数的和是()。A.216B.108C.314D.348
题型:单项选择题 女性,60岁。身高172cm,体重66kg,近来夜尿明显增多,空腹血糖6.4mmol/L,1月后做OGTT显示:空腹血糖6.7mmol/L,2h血糖6.1mmol/L,以下哪项考虑是正确的()。A.可除外糖尿病B.应重复1次OGTTC.可能患有隐性糖尿病D.应重复1次餐后2h血糖E.应做24h尿糖定量 查看答案
题型:单项选择题 常温下,用0.1000mol/LNaOH溶液分别滴定25.00mL0.1000mol/L盐酸溶液和25.00mL0.1000mol/LCH3COOH溶液,滴定过程中pH变化曲线如下图所示。下列判断不正确的是A.滴定盐酸的pH变化曲线为图2B.在滴定CH3COOH溶液的过程中,始终都有c(Na+)+ c(H+)=c(CH3COO–)+c(OH–)C.滴定CH3COOH溶液的过程中,当滴加12.5mLNaOH溶液时,溶液中离子浓度由大到小的顺序为c(CH3COO–)>c(Na+)>c(H+)>c(OH–)D.当c(Na+)=c(CH3COO–)+ c(CH3COOH)时,溶液的pH<7 查看答案
题型:单项选择题 焊接防护鞋的作用是()。A.防御焊接作业的火花、熔融金属、高温金属、高温辐射伤害足部,以及能使足部与带电物体绝缘,防止电击B.防御焊接作业的火花、熔融金属、高温金属、高温辐射伤害足部C.能使足部与带电物体绝缘,防止电击 查看答案
题型:单项选择题 The World Health Organization considers smoke from dirty stoves to be one of the five most serious health risks that face people in poor, developing countries. Nearly 2 million people die from its effects each year, more than twice the number from malaria. And because the smoke contains greenhouse gasses such as carbon dioxide and methane, as well as black carbon, it contributes to climate change. 查看答案