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33.Driving has been long thoughtof as (efficient) ________ than flying, but according to new research, that is no longer the case.

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34.Quotationsand samples will (send) ________to you as soon as we receive your specific inquiries.

豌豆是( )植物,低温长日照促进花芽分化

A. 长日照
B. 短日照
C. 中日照
D. 喜阳

栽培豌豆的品种类型有、和。

豌豆开花和结荚时雨水多或土壤湿度大,容易造成____现象。