下图是生物圈中碳循环的示意图，下列有关叙述中不正确的是(     ）                                

A．图中1表示的生理过程是光合作用

B．图中3的生理过程是呼吸作用

C．图中甲代表的生物是腐生细菌和真菌等

D．图中乙丙丁三者组成的食物链是:丁→丙→乙

_______ you are familiar with the author's ideas, try reading all the sections as quickly as you can.[ ]

A. So that  

B. Now that

C. Ever since  

D. As long as