题目

 水稻根尖细胞呼吸过程中，若单位时间内CO2的释放量与O2的吸收量的比值大于1，可能是 A．分解了脂肪                   B．有氧呼吸强度大于无氧呼吸 C．只进行无氧呼吸                 D．出现了无氧呼吸 答案：DMy grandpa sowed the flower seeds in the garden ______it was the best time for them to grow．A．whereB．whenC．thatD．until