中考真题2025年黑龙江省大庆市七选五-成群结队的鱼
Why do Fish Travel in Schools(群)?
Have you ever seen fish swimming together in a school? It’s quite an amazing sight! They move together, turning and changing directions at the same time. It makes you wonder: ____1____ In fact, the answer is no. Each fish finds its own direction. Researchers George Lauder from Harvard University and Yangfan Zhang have studied this for a long time. Now, they have discovered that fish can save a lot of energy by schooling.
In the experiment, the two researchers put giant danio, a fish that likes to swim in schools, in a tank(水箱) . ____2____ Other times, they put just one fish in. As we all know, by measuring(测量)how much O2 people use when exercising, we can know how much energy people use. The method also goes for fish. ____3____
The results were interesting and clear. Schooling fish used less O2 than those swimming alone. And they took less time to become energetic again. ____4____ The researchers repeated this experiment five times to make sure the results were right. By schooling, fish can save energy for other important things, says Frank Fish from West Chester University. ____5____ For adults, they can use the saved energy to have babies or to stay away from animals that want to eat them.
So, next time you see fish swimming in schools, you’ll know it’s not just a beautiful sight — it’s also a smart living skill for them.
A.Why do they swim in a school?
B.Is there someone directing them how to move?
C.Adult fish in a school are not afraid of anything.
D.In other words, they were full of energy in a shorter time.
E.Sometimes, the researchers put eight fish in a tank at a time.
F.For example, young fish can put the saved energy into growth.
G.So researchers used a special machine to measure how much O2 fish used when swimming.
1.1.
A
B
C
D
解析：选B。前文描述了鱼群一起游动，同时转弯和改变方向这一奇妙景象，接着提出问题“It makes you wonder”（这会让你想知道），B选项“Is there someone directing them how to move?”（有人指挥它们如何移动吗？）符合语境，是对这一奇妙景象引发的疑问，所以选B。
2.2.
A
B
C
D
解析：选E。前文提到把喜欢群游的巨暹罗鲤放在水箱里，后文说“Other times, they put just one fish in.”（其他时候，他们只放一条鱼进去），E选项“Sometimes, the researchers put eight fish in a tank at a time.”（有时，研究人员一次在水箱里放八条鱼）与后文形成对比，说明了不同情况的实验设置，所以选E。
3.3.
A
B
C
D
解析：选G。前文提到测量人运动时消耗的氧气量可以知道人消耗的能量，这种方法也适用于鱼，G选项“So researchers used a special machine to measure how much O2 fish used when swimming.”（所以研究人员使用一台特殊的机器来测量鱼游泳时消耗的氧气量）承接上文，说明了研究人员针对鱼采取的具体测量方法，所以选G。
4.4.
A
B
C
D
解析：选D。前文说群游的鱼比单独游泳的鱼消耗的氧气少，而且恢复活力所需的时间更短，D选项“In other words, they were full of energy in a shorter time.”（换句话说，它们在更短的时间内充满活力）是对前文的进一步解释说明，所以选D。
5.5.
A
B
C
D
解析：选F。前文说群游可以让鱼为其他重要的事情节省能量，后文提到对于成年鱼，它们可以用节省的能量生宝宝或远离想吃它们的动物，F选项“For example, young fish can put the saved energy into growth.”（例如，幼鱼可以把节省的能量用于生长）是对前文的举例说明，符合语境，所以选F。