皮皮学，免费搜题
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【多选题】
以下几种方法,避孕成功率较高的有,(多选)A.
口服避孕药
B.
使用避孕套
C.
冲洗阴道
D.
体外射精
E.
安全期避孕
F.
上环避孕
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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