呼吸作用的产物正是光合作用[ ]
A．释放出来的
B．所需要的原料
C．所合成的物质
D．所分解的物质
答案：B
— ________ that he managed to get the information?
— Oh, a friend of his helped him. [ ]
A. Where was it
B. What was it
C. How was it
D. Why was it
全州有林地面积是多少？
