问题
选择题
甲种商品出现次品的可能性是20%,乙种商品出现次品的可能性是10%,则正确的说法是( )
A.甲种商品的次品比种商品的次品多一些
B.甲种商品的次品比种商品的次品少一些
C.甲乙两种商品的次品一样多
D.甲乙两种商品的次品数不能确定
答案
甲乙两种商品的总数目不确定,那么次品数就不能确定,故选D.
甲种商品出现次品的可能性是20%,乙种商品出现次品的可能性是10%,则正确的说法是( )
A.甲种商品的次品比种商品的次品多一些
B.甲种商品的次品比种商品的次品少一些
C.甲乙两种商品的次品一样多
D.甲乙两种商品的次品数不能确定
甲乙两种商品的总数目不确定,那么次品数就不能确定,故选D.
从方框中选择恰当的句子补全对话 | |
Tom: Hello , Gina ! Gina: Hello, Tom ! Tom: You have a new guitar. 1 Gina: Yes, I can. Music is my favorite subject. I think it's interesting. Tom: 2 Gina:I want to join the music club. 3 .So I want to join the science club, too. What club do you want to join? Tom: 4 And I am a good swimmer. So I want to join the swimming club. Gina: When do you have swimming classes? Tom: On Sunday afternoon. That's my favorite day. 5 Gina: Friday.
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