【正确答案】 1、N 在文章的“Emergent Layer”一段中说道；“These giant trees thrust above the dense canopy layer(树冠层)and have huge mushroom-shaped crowns． These trees enjoy the greatest amount of sunlight but also must endure high temperatures，low humidity，and strong winds。”从中得知，树冠层之上的这些大树是可以充分享受到阳光的。故答案为No。