Hình Chiếu Bằng Của Hình Nón Là Hình Gì? | Cungthi.online

• Bạn cần trợ giúp không?
• [email protected]

• Đăng nhập
• Đăng ký
• Liên hệ

Đăng nhập

• Trang chủ
• Hình chiếu bằng của hình nón là hình gì?

Câu 1:

Hình chiếu bằng của hình nón là hình gì?

A.

Hình tam giác

B.

Hình tam giác đều

C.

Hình chữ nhật

D.

Hình tròn

Những câu hỏi này đến từ bài kiểm tra này. Bạn có muốn thực hiện bài kiểm tra thử không?

Trắc nghiệm Công nghệ lớp 8 - Vẽ kĩ thuật: Bản vẽ các khối hình học - Đề số 1

• 12 phút
• 6 câu hỏi

Làm bài kiểm tra

Một số câu hỏi từ cùng một bài kiểm tra

• Vì sao chúng ta cần phải học môn Vẽ kĩ thuật?

• Hình trụ được tạo thành như thế nào? Nếu đặt mặt đáy của hình trụ song song với mặt phẳng hính chiếu cạnh, thì hình chiếu đứng và hình chiếu cạnh có hình dạng gì?

• Thế nào là ren trục?

• Cạnh khuất của vật thể được vẽ bằng nét gì?

• Hình nón được tạo thành như thế nào? Nếu đặt mặt đáy của hình nón song song với mặt phẳng hính chiếu cạnh, thì hình chiếu đứng và hình chiếu cạnh có hình dạng gì?

• Hình chiếu bằng của hình nón là hình gì?

Một số câu hỏi khác bạn có thể quan tâm

• Professional sport is a vital part of that industry, providing for millions of (37) ____________people all over the world.

• Read the following passage and choose A, B, C or D to indicate the correct answer to each of the following questions.

  In many ways, the increasingly rapid pace of climate change is a direct result of the growth of the human population. In the last 100 years, the world population has more than tripled, from just under 2 billion at the beginning of the century to nearly 7 billion today. In addition, the average person uses more energy and natural resources than the average person one hundred years ago, meaning that the rates of consumption are actually much higher than just the increase in population would imply. For example, it took the world 125 years to use the first one trillion barrels of oil. The next trillion barrels will be used in less than 30 years, which is almost 5 times as fast, not three.

  All of these activities: food production, energy usage, and the use of natural resources, contribute to climate change in some way. The greater amounts of oil and other fuels burned to create energy release chemicals which add to global warming. In order to produce more food, farmers cut down trees to gain more land for their fields. In addition, we cut down trees to build the houses needed for a larger population. Those trees are an essential part of controlling global warming; others are too numerous to mention.

  In addition to a growing population, the world also has a population that desires a higher standard of living than in the past, and a higher standard of living requires the use of even more natural resources. A look at one country will provide a clear example of this fact. China is the worlds most populous nation, with 1.3 billion people. Currently, the standard of living for most of those people is far below that of people in first world nations. Therefore, the average Chinese citizen uses far fewer natural resources and less energy than the average citizen of the US or Japan. But China is growing in power, and more of its citizens are beginning to expect a first world lifestyle. If every Chinese person attains a first world lifestyle, the amount of energy and natural resources needed in the world will double, even if the standard of living in every other nation on Earth remains the same as it is today.

  How many years did it take the world years to use the first one trillion barrels of oil?

• Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 21 to 25.

  Polar bears are in danger of dying out. Unlike some other endangered animals, it's not hunters that are the problem, it's climate change. Since 1979, the ice cap at the Arctic Circle where the polar bears has reduced in size (21)_________ about 30 per cent. The temperature in the Arctic has slowly been rising and this is (22)_________ the sea ice to melt, endangering the polar bears' home. The polar bears' main sources of food are the different types of seals found in the Arctic. They catch them by waiting next to the air holes seals have made in the ice. (23)_________ the bears are very strong swimmers, they could never catch seals in water. This means that the bears really do rely on the ice to hunt.

  Polar bears also need sea ice to travel. They can cover a huge territory and often swim from one part of the ice to another. They have been (24)_________ to swim up to 100 km, but when there is less ice, they may have to swim further and this can (25)_________ fatal to the bears. A number of bears have drown in the last few years and scientists believe that it is because they were not able to reach more ice before they became too tired and couldn't swim any further.

  They have been (24)_________ to swim up to 100 km, but when there is less ice,

• The word “consumption” in the passage is closest in meaning to___________.

• Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 21 to 25.

  Polar bears are in danger of dying out. Unlike some other endangered animals, it's not hunters that are the problem, it's climate change. Since 1979, the ice cap at the Arctic Circle where the polar bears has reduced in size (21)_________ about 30 per cent. The temperature in the Arctic has slowly been rising and this is (22)_________ the sea ice to melt, endangering the polar bears' home. The polar bears' main sources of food are the different types of seals found in the Arctic. They catch them by waiting next to the air holes seals have made in the ice. (23)_________ the bears are very strong swimmers, they could never catch seals in water. This means that the bears really do rely on the ice to hunt.

  Polar bears also need sea ice to travel. They can cover a huge territory and often swim from one part of the ice to another. They have been (24)_________ to swim up to 100 km, but when there is less ice, they may have to swim further and this can (25)_________ fatal to the bears. A number of bears have drown in the last few years and scientists believe that it is because they were not able to reach more ice before they became too tired and couldn't swim any further.

  they may have to swim further and this can (25)_________ fatal to the bears.

• According to the passage, which of these activities does NOT contribute to climate change in some way?