下图为一定条件下测得的典型阳生植物和阴生植物在不同的光照强度下CO2吸收(释放)量的曲线，有关说法不正确的是
A．①代表典型的阳生植物，②代表典型的阴生植物
B．a1和a2表示植物在黑暗中细胞呼吸放出CO2的量
C．b1和b2表示光合作用吸收CO2的量等于细胞呼吸放出CO2的量时的光照强度
D．光照强度大于c时，典型的阴生植物比典型的阳生植物CO2的吸收量大
答案：D
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| Why did I come today? I wondered. My Christmas list contained (包括) several people. And I knew their feelings would be hurt if I didn't buy them anything, so buying 1 is boring. Hurriedly, I 2 shopping and joined the long checkout lines. In front of me were a boy of about 5 and a younger girl. She carried a beautiful pair of 3 slippers (拖鞋). When we finally reached the cash register (收 银机), the girl 4 placed the shoes on the counter. She treated them as though they were a treasure. "That will be $6.09," the cashier said. The boy 5 his pockets. He finally came up with $3.12. "I guess we will have to put them back," he 6 said. "We will come back some other time, maybe tomorrow." With that words, a 7 broke from the little girl."But Jesus (耶稣) would have loved these shoes." "Well, we'll go home and work some more. Don't cry. We'll surely 8 ," he said. Quickly I handed $3.00 to the cashier. These children had waited in line for a long time. And, 9 , it was Christmas. Suddenly a pair of arms came around me and a small voice gratefully said, "Thank you." "What did you 10 when you said Jesus would like the shoes?" I asked. The boy answered. "Our mommy is sick and going to 11 . Daddy said she might go before Christmas to be with Jesus." The girl spoke, "My teacher said the streets in heaven are shiny gold, just like these shoes. Won't mommy be beautiful walking on those streets in these shoes?" My eyes flooded. "Yes," I answered, "I am 12 she will." Silently I thanked God for using these children to remind (提醒) me of the true spirit of giving. | ||||
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