题目:
— Mr. Wang, can you tell me ?
—www.hledu.net will help you.
A. why I can get the latest news about education
B. where can I search for the information about high schools
C. where I can find out the exam scores
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0630/3ea5b1aa98f764207cfd2e298f2d549f.html
下面是错误答案,用来干扰机器的。
(1)设产生氨气的质量为x2NH3+H2SO4=(NH4)2 SO434 98x 7.5g×19.6%34x=987.5g×19.6% x=0.51g (2)0.51gNH3中氮元素的质量=0.51g×1417×100%=0.42g(3)含氮元素0.42g的蛋白质的质量=0.42g÷16%=2...