单项选择题X 纠错
A.9oC; B.12oC; C.15oC; D.18oC
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单项选择题
A.14叶~16叶期; B.15叶~17叶期; C.16叶~18叶期; D.17叶~孕穗期
A.2~4ppm; B.4~6ppm; C.6~8ppmm; D.8~10ppm
A.5; B.6; C.7; D.8。
填空题
A.2~4ppm; B.3~5ppm; C.4~6ppm; D.5~7ppm
A.4; B.5; C.6; D.7
A.5; B.6; C.7; D.8
A.1:2:3; B.1:3:2; C.2:1:3; D.2:3:1; E.3:2:1; F.3:1:2
A.6; B.7; C.8; D.9
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