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Fish babies in space?! In a space study on zebrafish (斑马鱼), Chinese scientists have set a new record (纪录). They successfully got four zebrafish to live and grow in a closed-water world.
The zebrafish went to China’s space station on the Shenzhou ⅩⅧ spaceship (宇宙飞船) on April 25. Since then, they have lived in a closed fish tank (缸) with some plants. The fish grew up and had babies in 43 days.
In their special closed environment, the plants made air for the fish and the fish’s waste (排泄物) gave the plants food. The scientists gave the fish food through a special needle (针管).
Such a closed-loop ecosystem (封闭生态系统) is important for future studies in space. It means that plants and animals can live in space more simply and more easily.
The scientists also found that the zebrafish acted differently than on Earth. For example, they often swam on their back. The low gravity (重力) in space is a big reason. “On Earth, gravity pulls everything to Earth’s center, and animals can find their way easily. Gravity also makes their bodies work harder and become stronger,” said The Conversation.
Humans and zebrafish share 70 percent of the same genes (基因). So the new finding will help scientists better understand human health.
根据所阅读的短文内容,选择最佳选项。
(
A. Scientists from different countries did it together.
B. The zebrafish gave birth to four babies at last.
C. It took place in a closed environment.
(
(
A. Human bodies got stronger.
B. Animals could easily find the way.
C. The zebrafish swam upside down.
(
A. The plan for studying human genes.
B. The findings of the space study.
C. The importance of the study.
Fish babies in space?! In a space study on zebrafish (斑马鱼), Chinese scientists have set a new record (纪录). They successfully got four zebrafish to live and grow in a closed-water world.
The zebrafish went to China’s space station on the Shenzhou ⅩⅧ spaceship (宇宙飞船) on April 25. Since then, they have lived in a closed fish tank (缸) with some plants. The fish grew up and had babies in 43 days.
In their special closed environment, the plants made air for the fish and the fish’s waste (排泄物) gave the plants food. The scientists gave the fish food through a special needle (针管).
Such a closed-loop ecosystem (封闭生态系统) is important for future studies in space. It means that plants and animals can live in space more simply and more easily.
The scientists also found that the zebrafish acted differently than on Earth. For example, they often swam on their back. The low gravity (重力) in space is a big reason. “On Earth, gravity pulls everything to Earth’s center, and animals can find their way easily. Gravity also makes their bodies work harder and become stronger,” said The Conversation.
Humans and zebrafish share 70 percent of the same genes (基因). So the new finding will help scientists better understand human health.
根据所阅读的短文内容,选择最佳选项。
(
C
)1. What do we know about the space study?A. Scientists from different countries did it together.
B. The zebrafish gave birth to four babies at last.
C. It took place in a closed environment.
(
B
)2. Which picture should be in the circle to show the ecosystem in the fish tank?(
C
)3. What was the result of the low gravity in space?A. Human bodies got stronger.
B. Animals could easily find the way.
C. The zebrafish swam upside down.
(
C
)4. What is the last paragraph mainly about?A. The plan for studying human genes.
B. The findings of the space study.
C. The importance of the study.
答案
A. 1.C 2.B 3.C 4.C
