甲、乙两架飞机上共有568名乘客,如果甲飞机增加36人,乙飞机减少28人,那么两 发布时间:2017-05-05 17:34 │ 来源:www.tikuol.com 题型:解答题 问题: 甲、乙两架飞机上共有568名乘客,如果甲飞机增加36人,乙飞机减少28人,那么两架飞机的乘客同样多,问乙机原来有多少名乘客?
题型:解答题 根据音标拼写单词,使句子意思完整正确。1. He [spendz] _____ too much time playing with them.2. It's my first time to _____ [ju:z] the computer3. I usually go to bed at 9:00 but I can't go to _____ [sli:p] at once4. He is busy _____ ['pr?ktisi?] organizing the activities5. They are good _____ ['swim?z] 查看答案
题型:解答题 三明钢铁厂的化验员小曹为了检测生铁产品中铁的质量分数,取研磨成粉末的2.9g生铁样品放入烧杯中,向其中滴加溶质的质量分数为7.3%的稀盐酸直到恰好不再产生气泡,共用去这种稀盐酸50g(反应的化学方程式为Fe+2HCl=FeCl2+H2↑,生铁中杂质不参与反应).求:(1)溶质的质量分数为7.3%的50g稀盐酸中溶质的质量为______g.(2)生铁样品中铁的质量分数(精确到0.1%). 查看答案