Explorers started making navigation (导航) char...

Explorers started making navigation (导航) charts showing how wide the ocean was more than 500 years ago. But it’s much harder to calculate how deep it is.

In 1872 the HMS Challenger, a British Navy ship, set sail to learn about the ocean, including its depth. It carried 181 miles (291 kilometers) of rope to measure the depth of the ocean. During their four-year voyage, the Challenger crew collected samples of rocks, mud and animals from many different areas of the ocean. They also found one of the deepest zones, in the western Pacific, the Mariana Trench which stretches for 1,580 miles (2,540 kilometers).

Today scientists know that on average the ocean is 2.3 miles (3.7 kilometers) deep, but many parts are much shallower or deeper. To measure depth they use sonar, which stands for Sound Navigation And Ranging. A ship sends out pulses of sound energy and measures depth based on how quickly the sound travels back.

Ocean scientists like me study the sea floor because it helps us better measure the ocean. Our planet’s outer, layer is made of tectonic plates. The Hawaiian-Emperor Seamount chain, a line of peaks on the ocean floor, was created when a tectonic plate moved over a spot where hot rock welled up from deep inside the Earth. When two tectonic plates move away from each other underwater, new material rises up into Earths layer. This process, which creates new ocean floor, is called seafloor spreading. Sometimes super-hot liquids from inside the Earth shoot up through cracks in the ocean floor called hydrothermal vents.

Amazing fish, shellfish, tube worms and other life forms live in these zones. Between the creation and destruction of ocean plates, sediments (沉淀物) collect on the sea floor and provide an archive of Earth’s history, the evolution of climate and life that is available nowhere else.

1.Why did the HMS Challenger make the voyage?

A.To test navigation. B.To calculate the age of the ocean.

C.To explore the ocean. D.To do research into Mariana Trench.

2.How do scientists know the depth of the ocean?

A.By measuring it with ropes.

B.By studying samples of rocks and mud.

C.By analyzing the habitats of the animals.

D.By studying the returning speed of the sound.

3.What is the fourth paragraph mainly about?

A.Certain changes of the sea floor.

B.The layers that make up the Earth.

C.The way that a volcano comes into being.

D.Some definitions of the seafloor spreading.

4.What can be a suitable title for the text?

A.How Deep Is the Ocean? B.How Is the Ocean Studied?

C.Ocean: An Unknown World D.Nature: A Place for Wildlife

高三英语阅读理解简单题查看答案及解析

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Two new satellites of BeiDou Navigation(导航) Satellite System (BDS) 1. (send) into space on a Long March-3D carrier rocket from the Xichang Satellite Launch Center in Sichuan Province, China at 2:07 a.m. on November 19,2018. The satellites entered a Medium Earth orbit2. (safe) more than three hours later and will work with 17 other BDS-3 satellites already in space. They are also the 42nd and 43rd3. (member) of the BDS satellite family.

China launched these satellites with 4. aim of providing navigation services for countries and regions which participate in the Belt and Road Proposal by the end of 2018. “This is a key step for BDS developing 5. a Chinese experimental system to a regional and then a 6. (globe) navigation system,” said Yang Changfeng, chief designer of the BeiDou system. The positioning 7. (accurate) of the BDS-3 system has been improved to 2.5 meters to 5 meters, said Yang.

8. (name) after the Chinese term for the Plough, the BeiDou system has been serving China for 18 years 9. another six BDS-3 satellites will be put into the Medium Earth orbit from 2019 to 2020. The system is expected 10. (provide) first-class services around the globe by the end of 2020.

高三英语语法填空简单题查看答案及解析

China's Beidou Navigation Satellite System has started providing global services, ________ to become complete around 2020.

A. being scheduled　　 B. scheduled　　 C. to schedule　　 D. scheduling

高三英语单项填空中等难度题查看答案及解析

As the new term starts, freshmen around the world are asking the same question: how can I make the best of four years at college? The New York Times received suggestions recently from PhD students and seniors at some of the top universities . Here is their advice.

“Many young people today are raised in a protective cocoon(茧)”, wrote Tim Novikoff, a PhD student at Comell. “College is a time to explore the world beyond and a chance to learn new things about yourself. Take classes in different subjects. Try lots of different clubs and activities.”

Remember also to take some time away from campus, suggested Willie Lin, a student at Washington University. “If you spend all of your time in school, then it becomes too easy to let criticism from an unkind professor or a conflict with a roommate take up large proportions.”

Try to find work assisting a researcher or a professor---this is the advice from Aman Singh Gill, a PhD student at Stony Brook University. And he also said, “With a window into the world of research, you will find yourself thinking more critically, accepting fewer states at face value and perhaps developing a brave sense of what you can accomplish.”

Many young people can’t imagine even a single day without devices such as computers and cell phones. But try to keep yourself off them, cautioned Christine Smallwood, a PhD student at Columbia University.

Start by scheduling a few Internet-free hours each day, with your phone turned off. It’s the only way you’ll be able to read anything serious. “This will also have the benefit of making you harder to reach, and thus more mysterious and fascinating to new friends and acquaintances(熟人),” she suggested.

1.The underlined sentence in Paragraph 3 means we should _________.

A．spend more time at school                B．take some time out of school

C．listen to criticism more                   D．not argue with roommates

2.Who thinks it is important to consider something critically?

A．Aman Singh Gill                         B．Christine Smallwood

C．Tim Novikoff                           D．Willlie Lin

3.As for modern information devices, the last two paragraphs mean to tell us ________.

A．to keep ourselves off them forever not to use them

B．to turn them off

C．to make a schedule to use them

D．not to use them

4.This passage is mainly about _________.

A．tips from some students for college life

B．ways to read something serious regularly

C．days without cell-phones and computers

D．chances to go to university you really like

高三英语阅读理解中等难度题查看答案及解析

Before the sales start, I make a list of 　　　　　　 my kids will need for the coming season．

A．why　　　　　　 B．how　　　　　 C．what　　 D．which

高三英语单项填空中等难度题查看答案及解析

The explorers had to make a fire at the edge of the forest to ________ wild animals at night.

A. scare up　　 　　　　 B. scare away

C. scare out　　 　　　　 　 D. scare in

高三英语单项填空中等难度题查看答案及解析

However, there was one band that started in a different way. It began as a TV show. The musicians of   31________ the band was formed played jokes   32___________    each other as well as played music. Their music and jokes were based loosely on the band called “The Beatles”. The TV organizers  33      (look) for four musicians who were lively and who could make good music. They put an advertisement in a newspaper  34      (look) for rock musicians, but they could only find one that was good enough. They had to use actors for the other members of the band. Actors may not be able to sing so at first other musicians sang the songs for the programme   35       the band pretended to sing them.

Their attractive performances  36      (copy) by other groups and their fans supported them fiercely. Each week the group that was called “The Monkees” would play a song or two written by other musicians. However, after a year or so in which they became   37        (serious) about their work, “The Monkees” started to play their own instruments and write their own songs like a real band. Then they produced their own records and started touring and playing their own music. They became even more popular than “The Beatles” in the USA and sold even more records. However, the band broke   38          in about 1970, but  39        (unite) in the mid-1980s. They produced a new record in 1996, which was a  40         (celebrate) of their time as a real band.

高三英语填空题简单题查看答案及解析

My First Job

Jay Leno is a very famous TV host in NBC．He started his talk show titled The Jay Lena Show in September 2009．It was a very popular TV programm in America．Here is the story of his first job．

I gained a very strong work concept from my parents, both of whom lived through a hard period of time-the Great Depression           （大萧条）．They couldn't ___36___ people who didn't work regularly．I once told my mom that Sylvester Stallone was getting $12 million for ten weeks of work．"What's he going to do the rest of the _37__?" she asked．

I took my first job at Wilmington Ford near my homerown of Andover, Massachusetts, when I was 16．I worked until five or six o'clock on school days and __38____ 12-hour days during the summer as a prepper（擦洗汽车的小工）．This meant washing and polishing the new cars, and making sure the paper floor mats were in __39__．Another responsibility was taking off the hubcaps (车轮毂盖） at night, so they wouldn't get stolen, and40them the next day．This was    41  work because we had about seven acres of 42One day, carrying an armful of hubcaps 43   a corner, I almost __44__ our new general manager．Scared, I dropped them all．He __45me on the spot．

I was too ashamed to tell my parents．Every day for about two weeks, I stayed __46until evening．Then I would go home and say I had a ．__47___ day at work．

Trying to make a last 48   ,  I wrote a letter to Henry Ford II and told him what happened．I said that we were a reliable Ford family and that when I was old enough, I was going to buy a Mustang． __49__ the owner of the dealership(经营店） called．"I don't know who you know in Detroit．" he said．"but if you want your job back, you've50it.”

Later, during college, I wanted to work at a Roils-Royce dealership, but the owner said there were no openings．So 1 started washing cars there anyway．When the ___51__ noticed me, I said I was working until he _52__ me．He did．And the second day, I started to work there as a sales clerk．

It53 persistence (坚持） to succeed．Attitude 54_ matters．I have never thought I was better than anyone else, but I have always believed I couldn't be _ 55 ．

1.                A．see            B．know           C．understand    D．love

2.                A．day            B．month          C．week D．year

3.                A．put in          B．took up         C．gave out  D．stuck to

4.                A．place          B．need           C．shape    D．fashion

5.                A．changing        B．selling          C．replacing D．cleaning

6.                A．hard           B．normal         C．regular   D．plain

7.                A．mats           B．cars            C．areas D．floors

8.                A．at             B．in             C．beyond   D．around

9.                A．broke into      B．looked across    C．crashed into   D．came across

10.               A．fired           B．left            C．punished  D．forgot

11.               A．calm           B．busy           C．still   D．alone

12.               A．stressful        B．relaxing        C．bad  D．great

13.               A．effort          B．change         C．dialogue   D．decision

14.               A．Gradually       B．Eventually       C．Temporarily    D．Hopefully

15.               A．reached        B．passed         C．got   D．caught

16.               A．prepper        B．owner         C．clerk D．customer

17.               A．helped         B．tired           C．hired D．called

18.               A．makes         B．shows          C．carries    D．takes

19.               A．also           B．even           C．never D．ever

20.               A．followed        B．scolded        C．defeated  D．interrupted

高三英语完型填空中等难度题查看答案及解析

听下面一段较长对话，回答以下小题。

1.Why is the woman worried?

A. The show won't start on lime.

B. The man forgot to bring her book.

C. She’s afraid of the man.

2.How does the man end the argument with the woman？

A. He says something to calm her down.

B. He drives her to her house.

C. He apologizes to her.

高三英语长对话中等难度题查看答案及解析

Music is often targeted at teenagers. Because teenagers go through big changes and start making life-affecting decisions in their teens, people naturally wonder what effects music has on teenagers. Does it lead to violence? Help test scores? Teach them valuable lessons? 1.

Music can help students improve academic performance. Studying music involves math and science, so students often improve in these areas. 2.According to a report, students who took part in music performance scored 41 points higher in math than those who did not take part in music performance.

Being a teenager can be rough emotionally. Music is an especially emotional art form covering every type of emotion. 3. As music is a way to express emotions, many teenagers might try to make their own music, which can create healthy emotional expression.

4. Thus, listening to music can teach teenagers a lot about their own culture and other cultures. They can learn musical traditions, musical instruments, history lessons and more. Plus, as listening to music is a fun activity, this can often be a more interesting way to learn about a culture, rather than simply reading a textbook.

Music tastes and interests can often bring people together, especially teenagers. 5. As well, music is often enjoyed at concerts and dance clubs where teenagers often hang out. Typically, the people attending these concerts and dance clubs already share a common interest, so a connection can be easily made.

A. Music is often related with culture.

B. This improvement can benefit them in tests.

C. Music greatly improves teenagers,learning abilities.

D. While there are negative effects, there are many positive effects, too.

E. If they can find a song that matches their mood, they will feel comfortable.

F. Rap music presents a new vocabulary teenagers won't learn in an English class

G.Two teenagers who like the same style of music are easily to start up a friendship.

高三英语七选五中等难度题查看答案及解析