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补作业 bibile: 33' P: carpet market is limited to a range of consumers not purchase that often C: market cannot be expand to other area weaken: produce other kind of carpet that allow repeat purchase, like small ones for the bathroon answer:A
2,20' P: e keyboard allow faster typing C: replace with e keyboard will reduce typing cost weaken: other reason to raise the cost, like expensive worker answer
3.more than 60' (what means by"had it not been "?) P: recession prediction trigger the dollar value decline C: recession prediction without a huge budget deficit will not affect dollar??????cutting budget could prevent dollar value decline?( totally confused ,sori) weaken: something about relationship with budget , recession and dollar value answer: D
4.45’ P:asthma caused by messenger cell C: asthma could be prevent by block it weaken: block may cause other effect answer: D
5. P: F had made in lab under special condition C: natural F can tell the condition of earth of its era weaken: lab is different with nature, answer: D |
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