On a clear night, you can see a sky paced with stars. But you can’t see planets orbiting any of these stars, even with the strongest Earth—based telescopes. Astronomers reported that they discovered seven Earth—sized planets orbiting a nearby star called TRAPPIST – 1 in February. They had to rely on indirect evidence to tell them that the planets are there. By doing some math, they figured out the number of planets and the distance of their orbits.
TRAPPIST – 1 is a red dwarf （红矮星）, much smaller than our sun, but larger than Jupiter (木星). If the sun were the size of a basketball, TRAPPIST – 1would be the size of a gold ball. This star is one of our closest neighbors, just like the moon to the earth in space.
When astronomers using Earth-based telescopes to study TRAPPIST – 1,they noticed that every once in a while, it became slightly dim（昏暗）. They decided that a planet must be passing in front of the star, blocking part of the light. This dimming would come and go as the planet orbited the star, passing alternately (交替地) behind and in front of the star regularly.
By making careful observations, astronomers expected to get a rough idea of the planet’s size from the pattern of dimming light. But the light level changed often and not at evenly spaced (均匀间隔的) times. The astronomers had to conclude they were looking at more than one planet! To get additional data, NASA’s spritzer Space Telescope measured TRAPPIST –1’s brightness nearly continuously for 20 days, catching 34 crossings of planets in front of the star. Sorting through the mess of data, the astronomers found that the innermost planet completes its orbit in 1.5 Earth days, while the outermost planet takes 20 days. Once you know how long it takes each planet to complete an orbit, you can work out how far it is from the star compared with the other planets.
The TRAPPIST – 1 planets are not alone. So far, astronomers have found more than 3,400 planets that orbit other stars.
1.How did astronomers know the number of planets orbiting TRAPPIST –1?
A. They used their eyes. B. They used telescopes.
C. They performed some calculation. D. They made some guess.
2.How does the author introduce TRAPPIST – 1 in paragraph 2?
A. By giving examples. B. By making comparisons.
C. By providing research results. D. By listing some numbers.
3.What probably causes the star TRAPPIST – 1 to be slightly dim?
A. The telescope’s failure. B. The cloud floating around.
C. The star’s moving. D. The passing planets.
4.What’s the main idea of Paragraph 4?
A. The ways to get the information of the planets.
B. The introduction of the planets.
C. The distances of the planets to the star.
D. The astronomers’ effort of exploring TRAPPIST – 1.
高二英语阅读理解中等难度题
On a clear night, you can see a sky paced with stars. But you can’t see planets orbiting any of these stars, even with the strongest Earth—based telescopes. Astronomers reported that they discovered seven Earth—sized planets orbiting a nearby star called TRAPPIST – 1 in February. They had to rely on indirect evidence to tell them that the planets are there. By doing some math, they figured out the number of planets and the distance of their orbits.
TRAPPIST – 1 is a red dwarf （红矮星）, much smaller than our sun, but larger than Jupiter (木星). If the sun were the size of a basketball, TRAPPIST – 1would be the size of a gold ball. This star is one of our closest neighbors, just like the moon to the earth in space.
When astronomers using Earth-based telescopes to study TRAPPIST – 1,they noticed that every once in a while, it became slightly dim（昏暗）. They decided that a planet must be passing in front of the star, blocking part of the light. This dimming would come and go as the planet orbited the star, passing alternately (交替地) behind and in front of the star regularly.
By making careful observations, astronomers expected to get a rough idea of the planet’s size from the pattern of dimming light. But the light level changed often and not at evenly spaced (均匀间隔的) times. The astronomers had to conclude they were looking at more than one planet! To get additional data, NASA’s spritzer Space Telescope measured TRAPPIST –1’s brightness nearly continuously for 20 days, catching 34 crossings of planets in front of the star. Sorting through the mess of data, the astronomers found that the innermost planet completes its orbit in 1.5 Earth days, while the outermost planet takes 20 days. Once you know how long it takes each planet to complete an orbit, you can work out how far it is from the star compared with the other planets.
The TRAPPIST – 1 planets are not alone. So far, astronomers have found more than 3,400 planets that orbit other stars.
1.How did astronomers know the number of planets orbiting TRAPPIST –1?
A. They used their eyes. B. They used telescopes.
C. They performed some calculation. D. They made some guess.
2.How does the author introduce TRAPPIST – 1 in paragraph 2?
A. By giving examples. B. By making comparisons.
C. By providing research results. D. By listing some numbers.
3.What probably causes the star TRAPPIST – 1 to be slightly dim?
A. The telescope’s failure. B. The cloud floating around.
C. The star’s moving. D. The passing planets.
4.What’s the main idea of Paragraph 4?
A. The ways to get the information of the planets.
B. The introduction of the planets.
C. The distances of the planets to the star.
D. The astronomers’ effort of exploring TRAPPIST – 1.
高二英语阅读理解中等难度题查看答案及解析
You can see the stars on a clear night, but in the daytime they are _____
A. unbelievable B. invisible C. inaccessible D. unavailable
高二英语单项填空简单题查看答案及解析
You can see the stars on a clear night, but in the daytime they are __________.
A. unbelievable B. invisible C. inaccessible D. unavailable
高二英语单项填空简单题查看答案及解析
----I can’t see the words on the blackboard clearly.
----Why, your eyes need _____. Perhaps you need ______ glasses.
A. examining; wearing B. to examine; wearing
C. to be examined; to wear D. examined; wearing
高二英语单项填空中等难度题查看答案及解析
Our room was on the second floor but you could still hear the roar of the ocean and see the stars at night. I used to take long walks along the water. The food in town was wonderful and the people were very friendly. The area was very quiet and peaceful, and fairly deserted.
The last evening of our vacation, however, we all heard strange footsteps following closely behind us as we were walking up to our room in the holiday centre. We turned around and noticed a fairly young man moving very rapidly across the beach and getting closer to us. He was tall and wore a baseball cap. We couldn’t see his face and he was approaching us very rapidly. The man’s actions made my dad very nervous. Dad warned us that we’d better try to make it to our hotel room as quickly as possible. I didn’t like my dad’s voice; I could hear fear in it. It was late and we were all alone. We didn’t have any cell phones on us. I never saw Dad as worried as he was then and I knew that something was terribly wrong. The sense of fear started to overwhelm Mom and me. We had had such a good time in town. Now, the night was rapidly turning into a dangerous situation.
We could hear the man’s footsteps getting closer. Dad’s face was almost pale. The so-called intruder (侵入者) had moved nearer and nearer when all of a sudden, the nearby vending (自动贩卖) machine started going crazy and spitting out cans of soda! The noise actually scared the intruder and he ran out of sight. My parents were shaking, but we all turned around to see who had put money into the vending machine downstairs, and actually saved us, but no one was around at all. Not a soul.
It’s one vacation I will never forget.
1.Where did the author spend her vacation?
A. Near a lake. B. At the seaside.
C. In a village. D. In a mountain.
2.What does the underlined word “overwhelm” in Paragraph 2 mean?
A. move. B. impress. C. control. D. excite.
3.What helped them get out of the trouble?
A. Their quick action.
B. Other people’s kind help.
C. The young man’s warning.
D. The noise from the vending machine.
高二英语阅读理解中等难度题查看答案及解析
Will was lying on the grass, _______the sky thick with stars.
A．his eyes fixing on B．fixed his eyes on
C．his eyes were fixed on D．his eyes fixed on
高二英语单项填空中等难度题查看答案及解析
With so much work on hand, you _____ to see the game last night.
A．mustn’t go B．shouldn’t go C．couldn’t have gone D．shouldn’t have gone
高二英语单项填空简单题查看答案及解析
These are some signs that you can see on the roads of Great Britain.
Number one is a sign with the number thirty on it. When drivers see this sign they must not go at more than thirty miles an hour. We see this sign when we get to parts of the country where there are many houses and other buildings, for example, when we are getting near a town. Thirty miles an hour is the speed limit. Number two is sign for the end of the speed limit. We are out of the town now and may go at more than thirty miles an hour. Number three is a sign that we are near a crossroads, that is, a place where two roads cross. We must drive carefully. Number four is a sign that there is a bend in the road. Again, we must drive slowly and carefully. Number five is a sign that there is a hill and number six is a sign that the roads get narrow. Drivers must go slowly and carefully. Number seven has the word “school” on it. This is a sign that there is a school at the side of a street or road. Perhaps there are children going to school or leaving school. So drivers must look carefully and go slowly until they are past the school building.
Number eight is a sign with the letter P on it. The letter P is for “parking.” A parking place is a place where drivers may leave their cars. If the driver of a car wants to leave his car and go to the shops, he looks for this sign. Then he knows that he may leave his or her car there.
1.Who will most probably read the passage?
A. People who drive badly. B. People who are learning to drive.
C. People who drive well. D. People who drive carelessly.
2.When a driver sees the sign number one, he must .
A. always go at 30 miles an hour
B. go at more that 30 miles an hour
C. not go at more than 30 miles an hour
D. stop
3.A driver must drive carefully when he gets to .
A. a bend B. a crossroads
C. a narrow road D. all of them
4.If a driver wants to leaves his car and go to the shops, .
A. he can leave his car anywhere
B. he can leave his car at the gate of any shop
C. he must look for the sign with the letter P on it
D. he can leave his car at the side of the street.
5.Now , you—three drivers are driving side by side along the road, if you see the No. six sign, you have to _______.
A. drive along one after one because the road is not wide enough
B. drive more slowly because of the speed limit
C. drive more carefully because school children may cross the road
D. drive slowly because you have got to drive uphill
高二英语阅读理解中等难度题查看答案及解析
Not only with your phone, but you can use it to send e-mails, chat on instant messenger, listen to music and even watch television.
A. you can take pictures B. can take pictures you
C. can take you pictures D. can you take pictures
高二英语单项填空中等难度题查看答案及解析
语法填空
阅读下面材料，在空白处填入适当的内容（只填1词）或括号内单词的正确形式。
“You can always see a beautiful sky at the top of the mountain, but you can’t see it before you reach the top.”
Whenever the sun 1. (drop) and the blue sky came up, my father and I used to climb the mountain near my house. 2. (walk) together, my father and I used to have a lot of conversations through 3. I learned lessons from his experiences. He always stressed to me, “You should have objectives and capacity (容量) like4. mountain.”
This5. (have) largely influenced my life. Without the mountain-climbing that we both enjoyed, we couldn’t have had enough time6. (spend) together because my father was very busy. I believe mountaineering is really7. (benefit). It gave me time to talk with my father and to be in deep thought as well as develop my 8. (patient). I loved climbing9. (mountain), to get away10. the noise and pollution of the city, and breathe the fresh air.
高二英语语法填空中等难度题查看答案及解析