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刷刷题刷刷变学霸
举一反三
【单选题】Dear Mr. Smith: Thank you very much for your inquiry dated December 12, 2002. I am glad to tell you that we are an outstanding hi-tech company specializing in telephone facilities and are able to of...
A.
telephone recorders
B.
exclusive products
C.
telephone facilities
D.
mobile telephones
【多选题】下列关于农田土壤采样说法正确的是
A.
对角线布点法适用于面积小地势平坦的污水灌溉田块
B.
梅花形布点法一般设5-10个采样点
C.
棋盘式布点法适用于中等面积、土壤较不均匀的田块
D.
蛇形布点法适用于面积较大的土壤，一般布点5-10个点