英语周报高二北师大版第四期答案2023-2024

英语周报高二北师大版第四期答案2023-2024

A black hole is a place in space where gravity pulls so much that even light cannot get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.

Because no light can get out, people can’t see black holes. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently from other ones.

Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or “staff”, in an object.

Another kind of black hole is called “stellar”(星球黑洞). Its mass can be up to 20 times more than the mass of the sun. There may be many stellar mass black holes in Earth’s galaxy. Earth’s galaxy is called the Milky Way.

The largest black holes are called “supermassive”(超大质量黑洞). These black holes have masses that are more than one million suns together. Scientists have found proof that every large galaxy contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would fit inside a very large ball that could hold a few million Earths.

Scientists think the smallest black holes formed when the universe began. Stellar black holes are made when the center of a very big star falls in upon itself, or falls apart. When this happens, it exploded part of the star into space. Scientists think supermassive black holes were made at the same time as the galaxy they are in.

A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting a black hole.

When a black hole and a star are close together, high-energy light is made. This kind of light cannot be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light.

1.The gravity of a black hole may become so strong that light cannot get out when ____________.

A. the star is going to die

B. special tools are used on it

C. other stars come close to it

D. it is seen from the space telescopes

2.According to the passage, which of the following is NOT true?

A. A black hole can be very tiny but extremely heavy.

B. The gravity of a black hole holds all light in its center.

C. Scientists observe high-energy light through their own eyes.

D. Some small black holes came into being as early as the universe.

3.Which can be inferred from the passage?

A. Every galaxy must have a black hole.

B. A galaxy is the center of the universe.

C. A galaxy consists of a large group of stars and planets.

D. Earth’s galaxy is called the Milky Way.

4.What does the last sentence in Paragraph 5 suggest?

A. Neither the sun nor the earth is as heavy as a black hole.

B. There is only one supermassive black hole at the center of the Milky Way.

C. The supermassive black hole had existed before the Milky Way was formed.

D. There is a reason why the large black holes are called “supermassive”.

5.The last two paragraph mainly focus on the question of _________.

A. what a black hole is

B. how black holes form

C. how big black holes are

D. how scientists know about black holes

英语周报高二北师大版第四期答案2023-2024试题答案

1.A

2.C

3.C

4.D

5.D

【解析】

试题分析：文章大意：文章介绍黑洞的形成，它的特点以及科学家探索研究黑洞的方法。

1. can happen when a star is dying.”可知恒星的死亡可能会形成黑洞。故选A。

2. black holes are very tiny but have the mass of a large mountain”这些黑洞可能会非常小，但是有一座山一样的质量，可知A正确；根据倒数第二段中“A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole.”黑洞不可见是因为强大的引力将所有的光线吸进黑洞的中间，可知B项正确；根据最后一句“Scientists use satellites and telescopes in space to see the high-energy light.”科学家们使用卫星和太空望远镜查看高能光，可知科学家不是用自己的眼睛，因此C错误；根据第六段中“Scientists think the smallest black holes formed when the universe began.”科学家认为最小的黑洞在宇宙开始时形成，可知D项正确。故选C。

3. galaxy is called the Milky Way”地球所在的星系叫银河系，常理可知星系是有很多星星组成的。故选C。

4. supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would fit inside a very large ball that could hold a few million Earths.”在银河系中心的超大质量黑洞的质量相当于四百万个太阳,是一个可以容纳几百万地球在内的巨大的球，由此可知这是在解释什么叫做“超大质量黑洞”。故选D。

5.

考点：考查科普教育类阅读

First Lady Michelle Obama is a big fan of volunteering. Volunteering means working for free to help someone else. Mrs. Obama says volunteering is very important. “It should be part of everyone’s life,” she says.

Many teens agree. They say that helping others feels great and makes a difference. These days, more teens volunteer than work for pay. Teens clean up parks, walk dogs at animal shelters, visit the elderly and more.

Some cities —- including Seattle, Chicago, and Washington, D.C. —-require high school students to volunteer. Students must volunteer in order to graduate. The student volunteers learn new skills and help their communities.

Many parents are in favor of the idea —- they say volunteering helps teens build job skills. But most teens don’t want to be forced to volunteer. They say they are busy. And they say volunteering is only fun if it’s a choice.

Read both sides of the debate and decide.

YES

Volunteering can help teens get into college or get a job.

Many cities and towns need help. Volunteers can help keep important programs going.

Not all teens will volunteer if it isn’t required. Schools should require students to do all they can to get ready for adult life.

NO

Most teens are already very busy with classes, homework, jobs and sports. Forcing them to do more isn’t fair.

It should be up to each person. Helping out doesn’t feel as good if you have to do it.

Finding a volunteer job isn’t always easy. Students shouldn’t be kept from graduating because of something they can’t control.

1.The writer mentions Michelle Obama in order to___________.

A. show she enjoys volunteering B. explain what volunteering is

C. tell what she does for the US D. introduce the topic of the text

2.According to the text, in Chicago, .

A. finding a volunteer job is quite easy

B. volunteering is a must for high school students

C. more people would rather work for pay

D. college students have to volunteer before graduation

3. Which question does the text mainly discuss?

A. Should students be required to volunteer?

B. Is volunteering good for students?

C. What is the best time to volunteer?

D. Which volunteer jobs should students do?

英语周报高二北师大版第四期答案2023-2024试题答案

1.D

2.B

3.A

【解析】

试题分析：本文通过米歇尔·奥巴马引出自愿者这个话题，进而介绍了自愿者工作的情况，并且讨论了学生是否要做自愿者。

1.

2.

3.

考点：考查说明类阅读

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