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弗兰克赫兹实验误差大的原因主要是？
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B.Further exercise:Choose the best word learned above in this lesson to complete each sentence.My friend is sick at the moment. I might _______ to cook some chicken soup for him.
Some types of foods can taste badly if you don't _______ them in a special way.
I generally like foods that have a salty or sweet _______, but dislike ones that are bitter.
The vegetables we eat at home are always very_______ because my father grows them in our garden.
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