After the course, Philip will
A. buy a new camera.
B. get a job in photography.
C. make photography his hobby.
查看答案
How much does Philip pay for the photography course？
A. ￡55
B. ￡75
C. ￡95
Newton believed that the force that pulled the apple down was not the same that kept the moon circling the earth.
A. Y
B. N
C. NG
A．The weather report is not accurate.B．The snow fell too deep.C．The weather report is
A. The weather report is not accurate.
B. The snow fell too deep.
C. The weather report is not available.
D. The snow fell too early.
关于富营养化，下面说法中正确的是（)。A．当湖水过于浑浊（非藻类浊度)或水草繁茂的湖泊，Carlson指数关于富营养化，下面说法中正确的是()。
A. 当湖水过于浑浊(非藻类浊度)或水草繁茂的湖泊，Carlson指数则不适用
B. Carlson开发出的营养状况指数(TSI)是一种用于评价湖泊富营养化的方法，它的标准是TSI＜40为贫营养，TSI介于40～50之间为中营养，TSI＞50为富营养。实践证明这个标准也同样适用于评价我国湖泊应用状况
C. 湖泊中总磷与叶绿素A和透明度之间存在一定的关系
D. pH值和碱度对于湖泊中磷的固定和人工循环的恢复技术具有重要的意义
E. pH值和碱度对于湖泊中氮的固定和人工循环的恢复技术具有重要的意义
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