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单选题
For children, playing is an automatic and integral component of growing up.
A
reminder
B
corrosion
C
junction
D
part
参考答案
参考解析
解析：
句意：游戏是孩子成长过程中自动的、完整的组成部分。component成分，部分，组成要素。part部分。reminder提醒者。corrosion腐蚀。junction连接。
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