- 免费咨询热线
- 400-168-9818
3. The signs found in NA could be left by native people of NA.
6. 阅读：有 3 种办法防止海龟减少
1建立金属围栏，防止海龟蛋被素食者吃掉
2禁用塑料袋，海龟吃了塑料袋，消化道会被堵塞
3把传统渔网改成只能捕鱼而不会限制海龟的，海龟被渔网捉住，会溺水
听力：上述办法都不行
1.金属围栏会阻碍小海龟的磁场发育，海龟靠磁场导航，找食物，找配偶， 找地方产卵。没有发育好的磁场，海龟根本无法生存，繁衍。
2.限制塑料袋或许有用。问题是，现在海里已经有成千上万的塑料袋了，即 使分解成了小片，一样会危害海龟。所以限塑解决不了燃眉之急。
3.改进的渔网，渔民会拒绝使用，因为网到的鱼会减少，收入会减少。即使 有法律规定必须使用，渔民也会趁没人使用传统渔网，回到岸上再换成改进渔网。
7. Reading:
The reading raises three methods to stop the spread of snake head fish because it threatens the ecosystem.
1.Making laws to prevent people from transporting snake head fish. Some people in the fish market wil1 illegally transport or release unsold Snake head fish.
2.Educating fishers to catch snake head. If they recognize that people actually can eat snake head as a food source, they will catch many to eat and to sell.
| 首页 | 上一页 | 当前页：69 [65] [66] [67] [68] [69] [70] [71] [72] [73] ... | 下一页 | 末页 |
