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【简答题】
设玻璃杯整箱出售，每箱20只各箱含0、1、2只残次品的概率分别为0.8、0.1、0.1、一顾客欲购买一箱玻璃杯，由售货员任取一箱，经顾客开箱随机查看4只，若无残次品，则买此箱玻璃杯，否则不买．求
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参考答案：
举一反三
【单选题】What does it mean by saying 'marriage really is...to buy at Tiffany‘s' （Line 2， Para.3）? 查看材料
A.
People can only buy nuptial stuffat a Tiffany store.
B.
Only a Tiffany store provides a marriage ceremony.
C.
Marriage is becoming more and more like luxuries.
D.
One can buy a marriage just like buying things in Tiffany's.
【单选题】遗体在安全检查消毒完成后，应开启遗体包装袋查看（），了解遗体死亡原因，检查随葬物品及贵重物品并当面与家属清点，并做好记录。
A.
随葬物品
B.
遗体状态
C.
贵重物品
D.
防腐效果
【单选题】'... generation gap is narrowing. 'means__________. 查看材料
A.
the adolescents now become timid
B.
parents come to get along with their children
C.
the vast majority of teenagers share most of their parents' values and ideas
D.
parents and teenager don' t like to quarrel
相关题目：
【单选题】What does it mean by saying 'marriage really is...to buy at Tiffany‘s' （Line 2， Para.3）? 查看材料
A.
People can only buy nuptial stuffat a Tiffany store.
B.
Only a Tiffany store provides a marriage ceremony.
C.
Marriage is becoming more and more like luxuries.
D.
One can buy a marriage just like buying things in Tiffany's.
【单选题】遗体在安全检查消毒完成后，应开启遗体包装袋查看（），了解遗体死亡原因，检查随葬物品及贵重物品并当面与家属清点，并做好记录。
A.
随葬物品
B.
遗体状态
C.
贵重物品
D.
防腐效果
【单选题】'... generation gap is narrowing. 'means__________. 查看材料
A.
the adolescents now become timid
B.
parents come to get along with their children
C.
the vast majority of teenagers share most of their parents' values and ideas
D.
parents and teenager don' t like to quarrel
参考解析：
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