问题
选择题
—Next Monday is my birthday.
—Is that so? ________
—Thank you.[ ]
A. I don't believe so.
B. I'm so glad.
C. What presents do you need?
D. Many happy returns of the day.
答案
答案：D
搜题请搜索小程序“爱下问搜题”
—Next Monday is my birthday.
—Is that so? ________
—Thank you.[ ]
A. I don't believe so.
B. I'm so glad.
C. What presents do you need?
D. Many happy returns of the day.
答案：D
2NO＋O2，此反应达到平衡状态时的标志是( )