题目内容
手宽指第五掌骨小头和第一掌骨小头之间的距离
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Underline the topic sentence of each paragraph.①Glass-walled skyscrapers can be especially wasteful. ②The heat loss (or gain) through a wall of half-inch plate glass is more than ten times that through a typical stone wall filled with insulation board. ③To lessen the strain on heating and air-conditioning equipment, builders of skyscrapers have begun to use double-glazed panels of glass, and reflective glasses coated with silver or gold mirror films that reduce glare as well as heat gain. ④However, mirror-walled skyscrapers raise the temperature of the surrounding air and affect neighboring buildings. for
Underline the topic sentence of each paragraph.①Americans make no distinction in greeting friends, acquaintances, elders, or superiors. ②When Americans see close friends, casual acquaintances, teachers, or even someone they know only by sight, they are likely to say “Hi” in all cases. ③This does not mean that they have no more regard for friends than for casual acquaintances. ④It only means that “Hi” serves as a greeting for both.
特基拉(Tequila)是由仙人掌酿制而成，只产于（ ）
白兰地起源于（）
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