森林群落的垂直结构通常包括乔木层、______、草本层和地被层四个层次。
参考答案:灌木层
— Could you give me ______ to eat? I’m so hungry.
— Of course. Here are some cakes and fruits.
A.nothing
B.anything
C.everything
D.something
根据所提供的图像,最可能的诊断是()
A.肝囊肿
B.肝血管瘤
C.肝再生结节
D.肝癌
E.以上都不是