Một vật dao động điều hòa theo phương trình x = 6cos2πt (cm). Biên độ và chu kì dao động của vật làA. 4cm, 1Hz. B.6cm,1s. C.4cm, 1s. D.6cm, 2s.
Hợp chất A là chất rắn, có nhiều ứng dụng như: chế tạo thuốc nổ, pháo hoa, sản xuất diêm. Chất A làA.Kali clorua. B.Natri clorua. C.Kali clorat. D.Natri hipoclorit.
Khi sóng ngang truyền qua một môi trường vật chất đàn hồi, các phần tử vật chất của môi trường sẽ :A.dao động theo phương truyền sóng với vận tốc bằng vận tốc dao động của nguồn sóng.B.chuyển động theo phương truyền sóng với vận tốc bằng vận tốc sóng.C.chuyển động theo phương vuông góc phương truyền sóng với vận tốc bằng vận tốc sóng.D. dao động theo phương vuông góc phương truyền sóng với tần số bằng tần số dao động của nguồn sóng
Sóng điện từA.không mang năng lượng. B.là sóng dọc.C.không truyền được trong chân không. D. là sóng ngang.
Coaxeva là :A.Các hợp chất hữu cơ có 3 nguyên tố : C, H, O như : lipit saccaritB.Các hợp chất hữu cơ hpana tử hòa tan trong nước dưới dạng những dung dịch keoC.Hỗn hợp 2 dung dịch keo khác nhau đông tụ lại thành những giọt nhỏD.Các enzim kết hợp với các ion kim loại và liên kết với các polypeptit
Sóng dọc:A.chỉ truyền được trong chất rắn và bề mặt chất lỏng.B.truyền được trong mọi chất, kể cả chân không.C.không truyền được trong chất rắn.D.truyền được trong chất rắn, chất lỏng và chất khí.
Tìm câu saiA.Lặp đoạn có ý nghĩa tiến hoá trong hệ genB.Một số đột biến đảo đoạn có thể làm tăng khả năng sinh sảnC.Sử dụng các dòng côn trùng mang chuyển đoạn làm công cụ phòng trừ sâu hại bằng biện pháp di truyềnD.Đảo đoạn tạo nguồn nguyên liệu cho tiến hoá
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.The modern comic strip started out as ammunition in a newspaper war between giants of the American press in the late nineteenth century. The first full-color comic strip appeared January 1894 in the New York World, owned by Joseph Pulitzer. The first regular weekly full-color comic supplement, similar to today's Sunday funnies, appeared two years later, in William Randolph Hearst's rival New York paper, the Morning Journal.Both were immensely popular, and publishers realized that supplementing the news with comic relief boosted the sale of papers. The Morning Journal started another feature in 1896, the "Yellow Kid," the first continuous comic character in the United States, whose creator, Richard Outcault, had been lured away from the World by the ambitious Hearst. The "Yellow Kid" was in many ways a pioneer. Its comic dialogue was the strictly urban farce that came to characterize later strips, and it introduced the speech ballon inside the strip, usually placed above the characters' heads.The first strip to incorporate all the elements of later comics was Rudolph Dirks's "Katzenjammer Kids," based on Wilhelm Busch's Max and Moritz, a European satire of the nineteenth century. The "Kids" strip, first published in 1897, served as the prototype for future American strips. It contained not only speech balloons, but a continuous cast of characters, and was divided into small regular panels that did away with the larger panoramic scenes of earlier comics.Newspaper syndication played a major role in spreading the popularity of comic strips throughout the country. Though weekly colored comics came first, daily black-and-white strips were not far behind. The first appeared in the Chicago American in 1904. It was followed by many imitators, and by 1915 black-and-white comic strip had become a staple of daily newspapers around the country.The passage suggests that comic strips were popular for which of the following reasons?A.They provided a break from serious news stories.B.Readers enjoyed the unusual drawings.C.Readers could identify with the characters.D.They were about real-life situations.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.The modern comic strip started out as ammunition in a newspaper war between giants of the American press in the late nineteenth century. The first full-color comic strip appeared January 1894 in the New York World, owned by Joseph Pulitzer. The first regular weekly full-color comic supplement, similar to today's Sunday funnies, appeared two years later, in William Randolph Hearst's rival New York paper, the Morning Journal.Both were immensely popular, and publishers realized that supplementing the news with comic relief boosted the sale of papers. The Morning Journal started another feature in 1896, the "Yellow Kid," the first continuous comic character in the United States, whose creator, Richard Outcault, had been lured away from the World by the ambitious Hearst. The "Yellow Kid" was in many ways a pioneer. Its comic dialogue was the strictly urban farce that came to characterize later strips, and it introduced the speech ballon inside the strip, usually placed above the characters' heads.The first strip to incorporate all the elements of later comics was Rudolph Dirks's "Katzenjammer Kids," based on Wilhelm Busch's Max and Moritz, a European satire of the nineteenth century. The "Kids" strip, first published in 1897, served as the prototype for future American strips. It contained not only speech balloons, but a continuous cast of characters, and was divided into small regular panels that did away with the larger panoramic scenes of earlier comics.Newspaper syndication played a major role in spreading the popularity of comic strips throughout the country. Though weekly colored comics came first, daily black-and-white strips were not far behind. The first appeared in the Chicago American in 1904. It was followed by many imitators, and by 1915 black-and-white comic strip had become a staple of daily newspapers around the country.The word “incorporate” in the third paragraph is closest in meaning to ________.A.affectB.createC.combineD.mention
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.The modern comic strip started out as ammunition in a newspaper war between giants of the American press in the late nineteenth century. The first full-color comic strip appeared January 1894 in the New York World, owned by Joseph Pulitzer. The first regular weekly full-color comic supplement, similar to today's Sunday funnies, appeared two years later, in William Randolph Hearst's rival New York paper, the Morning Journal.Both were immensely popular, and publishers realized that supplementing the news with comic relief boosted the sale of papers. The Morning Journal started another feature in 1896, the "Yellow Kid," the first continuous comic character in the United States, whose creator, Richard Outcault, had been lured away from the World by the ambitious Hearst. The "Yellow Kid" was in many ways a pioneer. Its comic dialogue was the strictly urban farce that came to characterize later strips, and it introduced the speech ballon inside the strip, usually placed above the characters' heads.The first strip to incorporate all the elements of later comics was Rudolph Dirks's "Katzenjammer Kids," based on Wilhelm Busch's Max and Moritz, a European satire of the nineteenth century. The "Kids" strip, first published in 1897, served as the prototype for future American strips. It contained not only speech balloons, but a continuous cast of characters, and was divided into small regular panels that did away with the larger panoramic scenes of earlier comics.Newspaper syndication played a major role in spreading the popularity of comic strips throughout the country. Though weekly colored comics came first, daily black-and-white strips were not far behind. The first appeared in the Chicago American in 1904. It was followed by many imitators, and by 1915 black-and-white comic strip had become a staple of daily newspapers around the country.According to the passage, the “Yellow Kid” was the first comic strip to do all of the following EXCEPT ________.A.feature the same character in each episodeB.include dialogue inside a balloonC.appear in a Chicago newspaperD.characterize city life in a humorous way
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