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【多选题】
立体异变分子具有重排现象,会产生分子。下列关于分子的形成,说法正确的是( )。A.
中的茂环发生σ→η异变并没有明显的能量变化。
B.
羰基金属簇化合物中羰基有多种不等价的立体异变形式。
C.
立体分子往往具有多种不同的配位方式。
D.
“马鞍”型环辛四烯化合物在某种能量状态下会经历一个平面型的过渡态，导致“马鞍”型结构的翻转。
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【单选题】What does Adam request?
A.
Sandra write a longer article
B.
Sandra come back to the office
C.
Sandra finish the report by next week
D.
Sandra interview more people in the future
【单选题】(3) The man talks to Sandra because he ______.
A.
wants to dismiss Sandra
B.
will give Sandra a promotion
C.
plans to transfer Sandra to another department
【单选题】We can see from the passage that ______ .
A.
Sandra is a very beautiful girl
B.
Sandra likes her job very much
C.
Sandra doesn't live a happy life
【单选题】The man talks to Sandra because he ______.
A.
wants to dismiss Sandra
B.
will give Sandra a promotion
C.
plans to transfer Sandra to another department
【单选题】计算机系统采用层次化结构组成系统，从最上层的最终用户到最底层的计算机硬件，其层次化构成为____。
A.
高级语言机器一操作系统机器一汇编语言机器一机器语言机器一微指令系统
B.
高级语言机器一汇编语言机器一机器语言机器一操作系统机器一微指令系统
C.
高级语言机器一汇编语言机器一机器语言机器一操作系统机器一微指令系统
D.
高级语言机器一汇编语言机器一操作系统机器一微指令系统一机器语言机器
【简答题】完成对话。 TOMY: Excuse me. Are you Sandra Li? SANDRA: 1______ TOMY: I'm Tony Liang. I'm in Grade Eight. We are publishing a newspaper this year, and I'm the sports editor. SANDRA: 2______ How can I help y...
【简答题】Sandra also points out that a new person can change the ______.
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