[单选题]以下关于光的⽅向描述,哪项是不正确的 ( )
A. 顺光——光线⽅向与拍摄⽅向相同
B. 逆光——光线⽅向与拍摄⽅向相同
C. 侧光——光线⽅向来⾃拍摄主体左右两侧
D. 底光——光线⽅向来⾃拍摄主体底部

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For millions’ of years we have known a world whose resource seemed illimitable however fast, we cut down trees, nature unaided would replace them. However many fish we took from the sea, nature would restock it. However much sewage we dumped into the river, nature would purify it, just as she would purify the air, however much smoke and fumes we put into it. Today we have reached the stage of realizing that rivers can be polluted past praying for, that seas can be overfished and the forests must be managed and fostered if they are not to vanish.
But we still retain our primitive optimism about air and water. There will always be enough rain falling from the skies to meet our needs. The air can absorb all the filth we care to put in it. Still less do we worry whether we could ever run short of oxygen. Surely there is air enough to breathe. Who ever asks where oxygen comes from, to begin with They should--for we now consume about 10 percent of al
A. He has exploited the earth' s resources.
B. He has shown little understanding of nature' s ways.
C. He has abused the earth' s resources.
D. He has not appreciated nature' s beauty and benefits sufficiently.