Whenis the packageestimated to be delivered?
A. a. On 14 January2014.
B. b. On 29 January 2014.
C. c. On the day after the shippingdate.
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Whowill pay for thepurchase?
A. a. Optimums Trading Co.
B. b. Kin Cube Inc.
C. c. One of Kin Cube Inc.'s customers.
Which of the following isacceptable according to the return policy?
A. The customer is allowed to return no more than 20% of the goods.
B. The customer needs to pay 20% of the purchase price to return the goods.
C. A 20% discount will be offered to the customer who would like to return the goods.
Wherewill the package besent to?
A. USA..
B. Hong Kong, China
C. UK.
无线网络的基本组成元素有哪些？无线宽带网络与有线宽带网络主要区别集中在数据链路层和物理层，与有线宽带网络相比较，无线宽带网络存在哪些技术难点？
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