【单选题】听力原文:M: I wish I hadn't thrown away that reading list! W: I thought you might regret it. That's why I picked it up from the waste paper basket and left it on the desk. Q: What do we learn from the con...
A.
The man regrets being absent-minded.
B.
The woman saved the man some trouble.
C.
The man placed the reading list on a desk.
D.
The woman emptied the waste paper basket.
【单选题】The Big-O notationrepresents accessing the i’th element in linked list with n elements is ( ).
【单选题】听力原文:W: I’m making a list have we run out of anything? M: Yes, I’ve run out of tissues. Could you pick some up for me? Q: Where are they planning to go? (15)
【简答题】(每空1分,共8分) 由丙烯经下列反应可得到F和高分子化合物G,它们都是常用的塑料 请回答下列问题: (1)F的同分异构体有很多,其中属于芳香烃(除去F自身外)有 种,化合物E的官能团的名称: 、 。 (2)写出下列反应过程的反应类型:A→B: 、E→G 。 (3)写出B→C反应的化学方程式为 。 (4)若A在NaOH的醇溶液反应,生成物仍为卤代烃,且其结构存在顺反异构,那么,A所发生的反应的化学...
【单选题】听力原文:M: I'm sorry, the class is full. W: Well, could I be put on the waiting list? Q: What does the woman imply? (16)
A.
He wants to wait until the class is full.
B.
He wants to take the class if someone drops it.
C.
He will wait for the professor.
D.
He is late and there are no more chairs.
【单选题】I was speaking with my son's teacher about what we could do _____ music education at his school. i m p r ove i m p r ov i ng t o i m p r o ve
【判断题】烯烃 a - H 卤代为自由基反应,是与烯烃的加成竞争的。