试题与答案

右图是某一动物物种迁入一个适宜环境后的增长曲线图,请据图回答下列问题: 处于一个理想

题型:填空题 案例分析题

题目:

右图是某一动物物种迁入一个适宜环境后的增长曲线图,请据图回答下列问题:

 

处于一个理想的环境中种群内个体增长曲线是(),图中的增长曲线是()型,曲线中表示K值的点是(),K值的含义为()。

答案:

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Do you know how to keep fish at home?
The fish need room(空间). They must not be crowded(拥挤). Fish need oxygen(氧气). Fish get it from water in the tank. There must be enough water for all fish in the tank. So the size of the tank is important..
In the tank many people put small plants. They give oxygen to the water. Plants help in other ways, too. Fish can nibble(轻咬)on the plants. They hide in the plants and sleep, lay eggs there.
Both the plants and fish need light. You can put it near a window. It will get light there. But remember: a window may let cold air in. The cold can kill(杀死) your fish. Too hot water can kill your fish, too.
The fish need food and you should feed them every day. Giving them too much food is bad. It will make the water dirty. However, the fish should get just enough food. They should finish the food in 10 minutes. No extra(多余) is left. When this happens, the amount(数量)of food is right.
How to keep fish at home
Advice
_______小题1:_____
1.The ___小题2:___ of the tank is important
Fish need enough room because they will be crowded in a small tank. They need __小题3:____ water because they get oxygen from it.
2.You can put small plants in the tank
Plants can give oxygen to the water, they also give a ____小题4:___ to fish to hide, sleep and lay eggs
3.You can put the tank ___小题5:___ a window, but don’t let cold air in.
Light is __小题6:____ for fish and plants. It can get in through the window. But you shouldn’t ___小题7:__ cold air can also get in and cold air will kill your fish.
4.Feed the fish every day but not too ____小题8:__
Too much food makes water ____小题9:___ easily. When fish can finish ____小题10:___ food in 10 minutes, the amount of food is right.
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