光合强度是指植物在单位时间内单位叶面积所吸收的二氧化碳量。( )
参考答案：对
The most important thing about cotton in history is ______ part that it played in _____ Industrial
Revolution. [ ]
A. /; /
B. the; /
C. the; the
D. a; the
民间音乐的界定？
