短时记忆是瞬时记忆和长时记忆的中间阶段。一般包括直接记忆和（）记忆两种成分。
参考答案：工作
Tom appreciated_________the good chance to study in Oxford since he graduated from No. 4 High School in Shenyang.
A．having been given
B．having given
C．having been giving
D．to have given
客车的分类标准是什么？
