题干
The soft music sounds ____. We are all listening ____.
A：beautiful; carefully
B：noisy; carefully
C：happily; careful
答案(点此获取答案解析）
A
The soft music sounds ____. We are all listening ____.
A：beautiful; carefully
B：noisy; carefully
C：happily; careful
与光合作用和呼吸作用的关系（叶面积指数是指单位面积上植物叶面积数量。此值越大，表示植物叶片交错程度越大）。图中阴影部分表
