learned abou 和learn 有什么区别.we have (learned about) all the elements on the periodic table in our science classes.we have learned correct grammer ,punctuation ,and spelling in our English classes...这是完形填空中的一段话,括号

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learned abou 和learn 有什么区别.we have (learned about) all the elements on the periodic table in our science classes.we have learned correct grammer ,punctuation ,and spelling in our English classes...这是完形填空中的一段话,括号
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learned abou 和learn 有什么区别.we have (learned about) all the elements on the periodic table in our science classes.we have learned correct grammer ,punctuation ,and spelling in our English classes...这是完形填空中的一段话,括号
learned abou 和learn 有什么区别.
we have (learned about) all the elements on the periodic table in our science classes.
we have learned correct grammer ,punctuation ,and spelling in our English classes...
这是完形填空中的一段话,括号里是要填的.选项有learned 和 learned about.
貌似是个排比句,da an 是learned about,为什么learned 不行!

learned abou 和learn 有什么区别.we have (learned about) all the elements on the periodic table in our science classes.we have learned correct grammer ,punctuation ,and spelling in our English classes...这是完形填空中的一段话,括号
about指“关于”所以learn about 是学习关于某一方面的知识,了解的意思,但是learn就是指学会什么,如果选择learned,意思就是,我们已经学会了所有的元素周期表,但是实际上我们主要了解关于这些关于元素的特性之类,元素本身不是学习的内容,要学习的是在元素周期表上的规律以及化学性质等.