Mark the letter A, B, C, or D on your answer sheet to indicate the word CLOSEST in meaning to the underlined word in each of the following questions.
People have used coal and oil to generate electricity for a long time.
A. make
Giải bởi qa.haylamdo.com
Kiến thức: Từ vựng
* Make: Tạo ra hoặc chuẩn bị thứ gì đó bằng cách kết hợp các vật liệu hoặc các bộ phận vào với nhau
* Create: Tạo một điều gì đó mới, chưa từng có trước đó
* Prevent: Ngăn ngừa điều gì xảy ra
* Invent: Phát minh, sáng chế
* Generate: Tạo ra, phát ra từ các vật liệu
Tạm dịch: Con người đã sử dụng than và dầu để tạo ra điện từ lâu.
Chọn đáp án A
According to paragraph 4, which of the following is the reason why satellites move out of the way?
If you want to be kept informed about current affairs you should listen to the radio.
Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions.
Read the following passage and mark the letter A, B, C or D on you answer sheet to indicate the correct answer to each of the questions.
SCIENTIFIC DISCOVERIES
A satellite is best understood as a projectile, or an object that has only one force acting on gravity. Technically speaking, anything that crosses the Karman Line at an altitude of kilometers (62 miles) is considered in space. However, a satellite needs to be going fast — at least 8 km (5 miles) a second - to stop from falling back down to Earth immediately.
If a satellite is traveling fast enough, it will perpetually "fall" toward Earth, but the Earth's curvature means that the satellite will fall around our planet instead of crashing back on the surface. Satellites that travel closer to Earth are at risk of falling because the drag of atmospheric molecules will slow the satellites down. Those that orbit farther away from Earth have fewer molecules to contend with.
There are several accepted "zones" of orbits around the Earth. One is called low-Earth-orbit, which extends from about 160 to 2,000 km (about 100 to 1,250 miles). This is the zone where the ISS orbits and where the space shuttle used to do its work. In fact, all human missions except for the Apollo flights to the moon took place in this zone. Most satellites also work in this zone.
Geostationary or geosynchronous orbit is the best spot for communications satellites to use, however. This is a zone above Earth's equator at an altitude of 35,786 km (22,236 mi). At this altitude, the rate of "fall" around the Earth is about the same as Earth's rotation, which allows the satellite to stay above the same spot on Earth almost constantly. The satellite thus keeps a perpetual connection with a fixed antenna on the ground, allowing for reliable communications. When geostationary satellites reach the end of their life, protocol dictates they're moved out of the way for a new satellite to take their place. That's because there is only so much room, or so many "slots" in that orbit, to allow the satellites to operate without interference.
While some satellites are best used around the equator, others are better suited to more polar orbits - those that circle the Earth from pole to pole so that their coverage zones include the north and south poles. Examples of polar-orbiting satellites include weather satellites and reconnaissance satellites.
(Source: https://www.space.com/24839-satellites.html)
Which of the following best serves as the title for the passage?
Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions.
To show the different ideas about love and marriage, a survey was conducted in American, Chinese and Indian students.
Which of the following is mentioned in paragraph 4 as an element that makes a satellite stay above the same spot on Earth?
We received a SOS signal appearing right here in this city, please connect the support team there immediately.
We got wet yesterday because we didn't remember to bring our raincoats.
