园林树木从开始生长到死亡,它的生长规律是().
A.快—慢—快
B.慢—快—快
C.慢—快—慢
D.快—快—慢
参考答案:C
_____ trees we cut down, _____ animals can survive. [ ]
A. the more, the less
B. the less, the more
C. the more, the fewer
D. the fewer, the less
通过学习,我们知道人体有三种血管,据你判断,三种血管都有的组织是
A.上皮组织
B.结缔组织
C.肌肉组织
D.神经组织