问题
选择题
— ____________ are you going there?
— On foot.[ ]
A. Where
B. How
C. Why
D. What
答案
答案：B
搜题请搜索小程序“爱下问搜题”
— ____________ are you going there?
— On foot.[ ]
A. Where
B. How
C. Why
D. What
答案：B
2NO2，反应达到平衡的标志是 [ ]