20
(A) Once depleted, most shark populations are slow to recover.
(B) No one knows if the ban will be enforceable, but at least it is on the books.
(C) Over the past years there have been a couple of very positive developments.
(D) Therefore, that has caused the number of male sharks to decrease sharply in the past few years.

答案:登入後查看
統計: A(27), B(12), C(77), D(23), E(0) #569918

詳解 (共 1 筆)

#984412

 However, given the species’ slow growth, it will take many years to see such recovery.”

 Over the past years there have been a couple of very positive developments. 
In October 2004, the United Nations Convention on International Trade in Endangered Species (CITES) placed great white sharks on its Appendix II list, which prohibits trade unless a country can demonstrate that it will not be detrimental to the species.

0
0