快捷更正错误的方法是()错误对象,然后选择正确内容。
A.单击
B.双击
C.右击
D.编辑
参考答案:B
His mother will tell him to do his homework _______ he gets home. [ ]
A. as early as
B. as quickly as
C. as soon as
D. as fast as
在盐酸萘乙二胺比色法测定苯胺中,氨基磺酸铵的作用是()。
A.帮助显色
B.帮助亚硝化
C.帮助重氮化
D.使显色稳定
E.除去过量的NaNO2