【判断题】不定积分和定积分在本质上是两个相同的概念
【单选题】—Could I do sports in the gym, Mr. Wu? —_____ Come in, please.
【单选题】—May I come in? I’m sorry I am late. — Come in, please. But could you please tell me ______?
A.
why you are late again
B.
what were you doing then
D.
how do you came to school