. This is a poem in the primary school text. In recent years, this phenomenon has appeared: the lotus has opened and the dragonfly has not yet come out. Why is there? "
Xiao-he exposed his sharp corner early, and no dragonfly stood on it.
"phenomenon?
Xiao-he just showed his sharp corner, and the dragonfly had already stood on it.
Xiao-he exposed his sharp corner early, and no dragonfly stood on it.
There are two main reasons:
1. Climatic reasons
. This climate mainly includes temperature and humidity. The degree of sunshine, wind and rain all have an influence. Many farmers who keep insects such as scorpions have thermometers to measure the temperature and humidity in the breeding room at any time. Dragonflies grow in the wild, so they are greatly influenced by the climate. For example, the climate has changed in the past two years, and the south has also suffered from ice and snow disasters in recent years. The north is also dry, cold and rainy. Sometimes people are caught off guard and can't cope in this weather, let alone a small insect.
1. Climatic reasons
2. the reason of water,
We all know the idiom "dragonfly".
In a river or pond, when a dragonfly flies over the water, it sticks the tip of its tail to the water. Gradually, this is the dragonfly that lays eggs. Of course, the premise is that there must be water, not drought. Dragonflies can touch water, but dragonflies can't touch soil.
2. the reason of water,
In a river or pond, when a dragonfly flies over the water, it sticks the tip of its tail to the water. Gradually, this is the dragonfly that lays eggs. Of course, the premise is that there must be water, not drought. Dragonflies can touch water, but dragonflies can't touch soil.
Water quality is also a major factor affecting dragonfly growth.
Dragonfly eggs hatch in water, including the growth of larvae, which requires high water quality. At present, agricultural pesticide residues and factory sewage have great influence on water quality. Don't say that there is no water in the drought. Even if there is water in some places, it has changed from the water of life to a pool of stagnant water. How dare dragonflies lay eggs and grow? Some people run away, some people die.
Of course, it is hard to see the poetry of "there was a dragonfly standing on it".
Water quality is also a major factor affecting dragonfly growth.
Of course, it is hard to see the poetry of "there was a dragonfly standing on it".
The article is original, and the pictures come from the Internet.