题目内容：
第52应填入______参考答案：
答案解析：
简答题：第52应填入______
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- 题目类型：简答题
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（ ） Bicycle became a practical means of transportation _____
（ ） Bicycle became a practical means of transportation __________ many improveme
第23答案是（ ）
第23答案是（ ）A．seldom B．sometimes C．always D．generally
Having no language, infants cannot be told what they need to
Having no language, infants cannot be told what they need to learn. Yet by the a
第25答案是（ ）
第25答案是（ ）A．because of B．instead of C．by D．with
第24答案是（ ）
第24答案是（ ）A．passing B．Doing C．carrying D．Sending