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【简答题】
分馏法是利用提取成分的{1}不同的性质达到分离目的的方法。
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举一反三
【单选题】Lynn: I love my new English class.
A.
What do you like about it?
B.
What do you think of it?
C.
What's your impression of it?
【简答题】Lynn: What’s sports do you like? Adam: Let’s see. I like skiing, surfing, and 1 . Lynn: Wow, you really like 2 sports! You’re very adventurous. Adam: Oh, I don’t do those sports – I 3 them on TV. How ...
【单选题】Choose the correct words to complete the conversation. Lynn: What sports do you like? Adam: Let's see. I like skiing, surfing, and ________. Lynn: Wow, you really like __2__ sports! You're very advent...
A.
extreme
B.
chess
C.
paragliding
D.
play
E.
tried
F.
watch
【单选题】Choose the correct words to complete the conversation. Lynn: What sports do you like? Adam: Let's see. I like skiing, surfing, and ____1____. Lynn: Wow, you really like ____ sports! You're very advent...
A.
extreme
B.
chess
C.
paragliding
D.
play
E.
tried
F.
watch
【简答题】Lynn: What sports do you like? Adam: Let's see. I like sking, surfing, and▁▁▁▁. Lynn: Wow, you really like▁▁▁▁sports! You're very adventurous. Adam: Oh, I don't do those sports - I▁▁▁▁them on TV. How ...
【单选题】灯A的额定电压为220V,功率为40W,灯B的额定电压为220V,功率是100W,若把它们串联到220V电源上。则( )
A.
灯A较亮
B.
灯B较亮
C.
两灯一样亮
【单选题】灯 A 的额定电压为 220V ,功率为 40W ,灯 B 的额定电压为 220V ,功率是 100W ,若把它们串联接到 220V 电源上,则( )
A.
灯 A 较亮
B.
灯 B 较亮
C.
两灯一样亮
D.
无法确定
【单选题】灯A的额定电压为220V,功率为40W,灯B的额定电压为220V,功率是100W,若把它们并联接到220V电源上,则
A.
灯A较亮
B.
灯B较亮
C.
两灯一样亮
D.
两灯都不亮
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