题目

Tim and Jack were good friends. Sometimes they were kind to each other, but sometimes they were not. But all of their classmates said they were like brothers. One day, they went out for a walk together. At noon they were very hungry and they went into a restaurant to have lunch. The waiter came up to them and asked,“What can I do for you?” “Please bring us two apples first, ”said Tim. When the waiter put two apples on the table, Jack took the bigger one at once. Tim got angry. “You are impolite, Jack. Why don't you take the smaller one?” Tim said. “But I am right,” said Jack wi以测定的CO2吸收量与释放量为指标，研究温度对某绿色植物光合作用与呼吸作用的影响，结果如图所示。下列分析正确的是A.光照相同时间，35℃时光合作用制造的有机物的量与30℃相等B.光照相同时间，在20℃条件下植物积累的有机物的量最多C.温度高于25℃时，光合作用制造的有机物的量开始减少D.两曲线的交点表示光合作用制造的与呼吸作用消耗的有机物的量相等