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【单选题】
青苹果汁遇碘显蓝色,熟苹果汁能还原银氨溶液,这说明()A.
青苹果中只含有淀粉而不含单糖
B.
熟苹果中只含单糖而不含淀粉
C.
苹果转熟时淀粉水解为单糖
D.
苹果转熟时单糖聚合成淀粉
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皮皮学刷刷变学霸
举一反三
【单选题】______to the sun for too long can hurt your skin.
A.
Being exposed
B.
To expose
C.
Exposing
D.
Exposed
【单选题】( )40. — Why do you look so happy, Mike? — Because I joined my favourite football team_______ _. A. That ' s very kind of you B. That ' s a good idea C. It ' s my lucky day
A.
That's very kind of you
B.
That's a good idea.
C.
It's muy lucky day.
【单选题】_______ to the sunlight for too long wi ll do harm to your skin.
A.
Exposing
B.
Exposed
C.
Bei ng exposed
D.
Having exposed
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