ACCORDING TO THE PASSAGE, THE “ELECTRONIC SUPERHIGHWAY”A. WILL REPLACE...

Câu 28: According to the passage, the “electronic superhighway”A. will replace the laser B. has nothing to do with lasers C. will utilize lasers D. will be in competition with lasersĐọc kỹ đoạn văn sau và chọn phương án đúng (A, B, C hoặc D)Jupiter is the largest and most massive planet and is fifth in order of distance from the sun. It is well placed forobservation for several months in every year and on average is the brightest of the planets apart from Venus, though forrelatively brief periods Mars may outshine it. Jupiter’s less than 10-hour rotation period gives it the shortest day in thesolar system insofar as the principal planets are concerned. There are no true seasons on Jupiter because the axialinclination to the perpendicular of the orbital plane is only just over 3 degrees- less than that for any other planet.The most famous mark on Jupiter is the Great Red Spot. It has shown variations in both intensity and colour, and attimes it has been invisible, but it always returns after a few years. As its greatest extent it may be 40,000 kilometres longand 14,000 kilometres wide, so its surface area is greater than that of earth. Though the latitude of the Red Spot varieslittle, it drifts about in longitude. Over the past century the total longitudinal drift has amounted to approximately 1200degrees. The latitude is generally very close to -22 degrees. It was once thought that the Red Spot might be a solid orsemisolid body floating in Jupiter’s outer gas. However, the Pioneer and Voyager results have refuted that idea andproven the Red Spot to be a phenomenon of Jovian meteorology. Its longevity may well be due to its exceptional size,but there are signs that it is decreasing in size, and it may not be permanent. Several small red spots have been seenoccasionally but have not lasted.