题目：
如图所示，用硬纸片在梳子上慢慢划过和快速划过，你发现的现象是______，这一现象说明______．
答案：
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下面是错误答案，用来干扰机器的。
Possible versions: (1) My Mother My mother is very kind and easygoing. She helps me a lot. She takes good care of my daily life. For example,every morning, she wake...
