初三下册英语重点语法用法.doc

High school geography (o clock) required 1 review the knowledge points Primary and high cohesion A map, 1. Contour interpretation: bending direction: convex high to low, convex low to high. 2. Slope size interpretation: the same map, steep thin slow; Share the same map, scale, the greater the contour interval, the greater the slope; The same map, contour interval, the bigger the scale, the greater the slope. Second, the earth 1, the prime meridian, the international rules, through the British capital of Londons Greenwich observatory site that a meridian, as 0 ° meridian, also called the prime meridian. Note: the place where the international standard time to 0 degrees longitude. 2, longitude: from 0 ° meridian, east, west members in 180 degrees, 180 degrees east of belong to the east, west of 180 degrees west longitude. 3, the east, the western hemisphere: since 20 ° W warp clockwise to (or from east to west) and 160 ° E meridian this part is called the western hemisphere. Since 20 ° W warp counter-clockwise from the west to the east (or ground) to 160 ° E meridian, this part is called the eastern hemisphere. Memory method: 0-20 degrees are in the western hemisphere; 160-160 degrees of the old world; The rest of the E is the eastern hemisphere, W for the western hemisphere. 4, meridian characteristics: (1) all the meridian meet in north and south poles; 2 all the meridian length is equal; (3) the two corresponding meridian constitute a coil, and can divide the earth into two hemispheres. 5, parallel: on the globe, with the equator, are called lines of latitude parallel length range. All the parallel form a circle, called the pickfinding coil. The first chapter: the earth in the universe A, planet earth 1. The universe: no start and no end of time the vastness of space. 2. The object: Low concept: the form of material existence, including streaming nebula, planets, stars, comets, and other interstellar matter (such as gas, dust). Low celestial sy