A. brief B. late C. peak D. long
A. can become an ongoing problem B. may last as long as a week C. are weight loss and mental disorder D. are usually short-lived
A. 20.8个百分点 B. 21.4个百分点 C. 31.5个百分点 D. 48.6个百分点
A. 1 B. 2 C. 3 D. 4
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