下图是生态系统碳循环示意图,图中“→”表示碳的流动方向。请回答:
分析A→E和D→B过程中碳流动形式的不同点()
参考答案:
A→E是以CO2形式,D→B是以含碳有机物形式
I’m sorry I didn’t hear what you said. I ________ the picture.
A.am looking at
B.looked at
C.has looked at
D.was looking at
You have to move out of the way the truck cannot get past you. [ ]
A. so
B. or
C. and
D. but