A.23°N,100°E B.23°N,120°E C.24°N,100°E D.24°N,120°E
A.山地高原阻擋冷空氣南下 B.氣候干燥,太陽輻射強 C.當(dāng)?shù)赝寥罓I養(yǎng)物質(zhì)豐富 D.河流眾多,灌溉條件好