↑ 收起筛选 ↑
试题详情

首字母填空

Are there any animals that can return to their youth (青年时期)? There is one in the animal kingdom. It is the animal c1. the immortal jellyfish ( 永 生 水 母 ). Do you know a2.  about it?

These small animals are just 4 to 5 millimeters ( 毫 米 )  l3.. Their digestive system ( 消 化 系 统 ) l4. like a light. That’s why they’re also called Turritopsis nutricula ( 灯塔水母 ). Scientists f 5.found them in the Mediterranean Sea in 1883, according to National Geographic. When scientists discovered ( 发 现 ) this, they were very s6. and they didn’t know much about it.

When these sea animals get hurt  in d7.situations, they can change their cells(细胞) back to their earliest form—in other words, back to youth. The jellyfish’s cells can change into d8.kinds of cells. Muscle cells can become sperm (精子) or eggs, or nerve cells can change into muscle cells. T9., they grow again. Scientists are still wondering h10.this happens. Isn’t that amazing?

七年级英语单词填空困难题

少年,再来一题如何?
试题答案
试题解析
相关试题