【正文】 ere they belong. Answer Choices ? Particles tend to be largest upstream and smallest downstream, probably because water flowing downstream erodes fine sediment from the larger particles. ? A wide variety of deposits, including bars, alluvial fan s, and deltas, are formed as a result of an increase in the speed of the downstream current. ? Bars monly shift from being point bars on a river bank to being midchannel bars. ? Deposits of sediment are found where flow velocity decreases, and when there is excessive sediment a stream may bee braided, dividing into several channels. ? Rivers that flow through arid and semiarid mountainous regions tend to form alluvial fans at bends in the river. ? Deltas, which are formed where streams enter lakes or the ocean, are naturally unstable landforms that can extend over a large area TPO373 Characteristic of roman pottery The pottery of ancient Romans is remarkable in several ways. The high quality of Roman pottery is very easy to appreciate when handling actual pieces of tableware or indeed kitchenware and amphorae (the large jars used throughout the Mediterranean for the transport and storage of liquids, such as wine and oil). However, it is impossible to do justice to Roman wares on the page, even when words can be backed up by photographs and drawing. Most Roman pottery is light and smooth to touch and very tough, although, like all pottery, it shatters if dropped on a hard surface, it is generally made with carefully selected and purified clay, worked to thinwalled and standardized shapes on a fast wheel and fired in a kiln (pottery oven) capable of ensuring a consistent finish. With handmade pottery, inevitably there are slight differences between individual vessels of the same design and occasional minor blemishes (flaws). But what strikes the eye and the touch most immediately and most powerfully with Roman pottery is its consistent high quality. This is not just an aesthetic。 floodplain deposits accumulate on a floodplain adjacent to the stream channel。 and channel deposits form in the stream channel itself. Bars, which are elongated mounds of sediment, are transient features that form in the stream channel and on the banks. They monly form in one year and erode the next. Rivers used for mercial navigation must be recharted frequently because bars shift from year to year. Imagine a winding stream. The water on the outside of the curve moves faster than the water on the inside. The stream erodes its outside bank because the current39。 the copper and tin needed for its manufacture did not exist in river valleys and had to be imported. Bronze was therefore used mainly for luxury items, such as jewelry or weapons, not for everyday domestic items, which were made from pottery, animal products, wood, and stone. ■In particular, bronze was not used for farming tools. ■Thus, early civilizations based on largescale agriculture, such as those of Mesopotamia and Egypt, were feasible only in soils that could be worked by wooden plows pulled by people or draft animals such as oxen. ■Other Bronze Age civilizations, however, such as those that arose in the Levant and eastern Mediterranean, took advantage of their location on munication routes to pursue economies based on trade. 10. The word domestic in the passage is closet in meaning to ? Practical ? Household ? Standard ? Necessary 11. According to paragraph 6, why was bronze not used for farming tools in Bronze age civilizations of the Near East ? Wooden farming tools were more effective in the soils of the region. ? Bronze farming tools would have deteriorated quickly in the climate. ? Bronze was too expensive to use for farming tools. ? People had not yet discovered how to make farming tools out of bronze. 12. According to paragraph 6, which of the following was true of at least some civilizations of the Bronze Age? ? They did not develop urban centers with large populations. ? They did not use metals to make bronze. ? They had an economy that was not based on agriculture. ? They did not use bronze for luxury items such as jewelry. 13. Look at the four squares [■] that indicate where the following sentence could be added to the passage. This significantly limited the availability of bronze. 14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points. Drag your choices to the spaces where they belong. To review the passage, click on View Text. Answer Choices ? Before the rise of large cities with plex economies, there had been no need for any kind of administrative structure to anize workers, and thus religion tended to be the only source of authority. ? Large cities functioned as administrative centers, creating a concentration of wealth and resources that stimulated technological advances, such as the invention of writing and the creation of bronze. ? By 3000 ., a number of agricultural societies had emerged as civilizations characterized by large cities, centralized administrations, specialization of labor, class divisions, metal technology, and writing. ? For a culture to be considered a civilization, it must have independently invented its own form of writing and bee generally literate, thereby moving from prehistory into the historic period. ? Although rivervalley societies had to import the metals for making bronze, the first phase of civilization is known as the Bronze Age because of the importance of metal technology in these societies. ? The creation of bronze made