Câu hỏi:

Điểm kiểm tra của 24 học sinh trong lớp 8A, được ghi lại trong bảng sau :Mốt của dấu hiệu điều tra là:

A. Mo = 2

B. Mo = 7

C. Mo = 6

Đáp án chính xác

D. Mo = 9

Trả lời:

Chọn C.Lập bảng tần số:Điểm123456789 Tần số133125333N = 24Ta thấy điểm 6 có tần số lớn nhất nên Mo = 6

====== TRẮC NGHIỆM TOÁN 10 =====



hoc tap vn

The reason is __________, he estimates how much the population of London will increase in the next 100 years.

Cho các điểm M(5;2), N(1; -4), P(3; 6) lần lượt là trung điểm các cạnh BC, CA, AB của tam giác ABC. Khi đó phương trình của cạnh AC là

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.They believe that burning fossil fuels is the main cause of air pollution.

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions from 38 to 45. If you go back far enough, everything lived in the sea. At various points in evolutionary history, enterprising individuals within many different animal groups moved out onto the land, sometimes even to the most parched deserts, taking their own private seawater with them in blood and cellular fluids. In addition to the reptiles, birds, mammals and insects which we see all around us, other groups that have succeeded out of water include scorpions, snails, crustaceans such as woodlice and land crabs, millipedes and centipedes, spiders and various worms. And we mustn’t forget the plants, without whose prior invasion of the land, none of the other migrations could have happened. Moving from water to land involves a major redesign of every aspect of life, including breathing and reproduction. Nevertheless, a good number of thoroughly going land animals later turned around, abandoned their hard-earned terrestrial re-tooling, and returned to the water again. Seals have only gone part way back. They show us what the intermediates might have been like, on the way to extreme cases such as whales and dugongs. Whales (including the small whales we call dolphins) and dugongs, with their close cousins, the manatees, ceased to be land creatures altogether and reverted to the full marine habits of their remote ancestors. They don’t even come ashore to breed. They do, however, still breathe air, having never developed anything equivalent to the gills of their earlier marine incarnation. Turtles went back to the sea a very long time ago and, like all vertebrate returnees to the water, they breathed air. However, they are, in one respect, less fully given back to the water than whales or dugongs, for turtles still lay their eggs on beaches. There is evidence that all modern turtles are descended from a terrestrial ancestor which lived before most of the dinosaurs. There are two key fossils called Proganochelys quenstedti and Palaeochersis talampayensis dating from early dinosaur times, which appear to be close to the ancestry of all modern turtles and tortoise. You might wonder how we can tell whether fossil animals lived in land or in water, especially if only fragments are found. Sometimes it’s obvious. Ichthyosaurs were reptilian contemporaries of the dinosaurs, with fins and streamlined bodies. The fossils look like dolphins and they surely lived like dolphins, in the water. With turtles it is a little less obvious. One way to tell is by measuring the bones of their forelimbs. (Adapted from Cambridge English IELTS 9)

Bộ 30 Đề thi Học kì 1 Tiếng Anh lớp 8 có đáp án năm 2022 – 2023

Giáo án Bài tập cuối chương 3 (Chân trời sáng tạo 2023) | Giáo án Toán 10

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