The teacher asked the students           . [ ]

A. when was Albert Einstein born

B. what they will do with the computers

C. if they were interested in dinosaurs

D. how many trees they have planted

关于好氧堆肥工艺的影响因素，下列说法不正确的是( )。

A．有机物含量低，发酵过程中产生热量不足，最终肥效低；有机物过高，通风供氧较为困难
B．碳氮比最佳为(25～35):1，高于40:1时，微生物繁殖因能量不足而受到抑制，分解缓慢且不彻底
C．肥堆水分过多，降低游离孔隙率，影响空气扩散；水分过低，微生物活性降低，堆肥温度随之下降
D．整个堆肥过程的适宜温度是35～55℃