图1                    图2

N₂（g）+3H₂（g）⇌2NH₃（g），△H＜0，在673K，30MPa下，n（NH₃）和n（H₂）随时间变化的关系如图所示，叙述正确的是（   ）

    Hi, good morning. My name is Wang Xu and I'm1student of No.8 Middle School. This is our2.It's new and big.3the library, you can4books everywhere, but it is still very5.We Call read books and do our homework(家庭作业)there.6the desks and chairs? They are on the second (第二) floor of the library. Look! That7is Linda. She is a friend of 8 .She likes reading and she is a good student. I think she is like my 9 because she often10me study English.