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【单选题】
某化合物在紫外光区204nm处有一弱吸收带,在红外特征区有如下吸收峰:3400cm-1—2400 cm-1处有宽而强的吸收,1710 cm-1处有强吸收峰,则该化合物可能是:( )A.
醛
B.
酮
C.
羧酸
D.
酯
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【简答题】123-125 第123题：
【简答题】阅读短文，选词填空。 jobs map look useful took how part What do you know about a robot? Robots are machines that can be made to do certain things. They are in all shapes. For example, puppy (a young...
【简答题】123-125 第123题：
【简答题】A: Hi, James! B: Hi, Mr Black! What’s that behind you? A: 小题1: B: A robot(机器人)? What can it do for you? A: It can help me remember a lot of important things. B: Really? It sounds very interesting.小题2:...
【单选题】What can robot do?
A.
Walk or roll on wheels
B.
Do housework, such as cleaning, washing.
C.
Both A and B.
【单选题】What can robot do?
A.
Walk or roll on wheels
B.
Do housework, such as cleaning, washing
C.
Both
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