皮皮学，免费搜题
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搜题
【多选题】
出口信用保险的经营具有以下特点( )A.
离不开国家的参与
B.
必须全额投保
C.
必须实行风险评估
D.
以大数法则为基础
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】听力原文：W: It's well-known science fiction plot to freeze a body and bring it back to life years later. However, this may no longer be so far from the truth. Joining us from our Cardiff studio is Profess...
A.
He is a film director of Science Fiction.
B.
He is a writer of Science Fiction.
C.
He is a scientist who researches on how to freeze a body and bring it back to life later.
D.
He is a doctor who treats terminal illnesses.
【简答题】怎样辩证地理解遗传与环境的关系?