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【判断题】
若X与Y相互独立,则D(X-Y)=D(X)+D(Y)。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】“海上生明月,天涯共此时”是谁的名句? ( )
【单选题】Prom/Promotion price refers to ( ).
A.
a product, service, or programme that is offered at reduced prices or rates.
B.
a product, service or programme that is offered at a 30% discount to consumers.
C.
a product or service that is offered at a lower price than regular price during the promotion.
D.
a product or service that is offered to consumers at a regular price while the second one is offered to them for free.
【简答题】第三方物流的优势何在？
【多选题】第三方物流的优势有( )。
A.
使客户企业集中主业
B.
为客户提供技术支持或解决方案
C.
使客户增强对物流的控制力
D.
为客户提供灵活性增值服务
E.
节省物流费用，减少库存
【简答题】完形填空。 School was over and I was both mentally and physically tired, I sa t at the very front of the bus because of 1 to get home.Sitting at the front makes you 2 out like a shiny coin in a pile of dul...
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