SH Betty Science p134-137 20190415
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SH Betty 第一章 20190413
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SH Betty Reading last paragraph on p204 20190412
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SH Betty Reading last paragraph on p198 20190411
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SH Betty Science p132 20190411
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SH Betty Science p128-129 20190411
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SH Betty Chinese 20190410
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SH Betty Reading last paragraph on p193 20190409
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SH Betty Science p114-116 20190404
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SH Betty Reading last paragraph on p188 20190408
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