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问题 问答题

现有一种铜和氧化亚铁的混合物样品．为测定该样品中氧化亚铁的含量，某学生取20.0g此样品置于烧杯中，分四次加入密度为1.22g/cm3的硫酸并做相关记录．有关数据记录如下：

加硫酸的序号加入硫酸的体积/mL剩余固体的质量/g
120.016.0
220.012.0
320.08.0
420.08.0
则：10.0g此样品中铜的质量是______．

答案

因为铜不与硫酸反应，氧化亚铁与硫酸完全反应后剩余固体就是铜，质量为8.0g．

那么10.0g此样品中铜的质量为：10.0g×

8.0g
20.0g
=4.0g．

故答案为：4.0g．

单项选择题

( )是某种房地产在市场上的一般、平均水平价格，是该类房地产大量成交价格的抽象结果。

A．理论价格
B．成交价格
C．市场价格
D．清算价格
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问答题

Turkey’s Bodrum peninsula is different. The tourist boom in this part of the world (1) turned some small villages into resorts yet left neighbouring beaches undisturbed, making it quite (2) southern France or the Spanish Coasts where few stretches of coastline are undevelopeD．
The (3) for this happy set of circumstances is simple. For thousands of years, travel here (4) easier by boat than by lanD．So when mass tourism arrived in the (5) 1980s, there was no coast road for ribbon development to follow. So the peninsula, just (6) hour from Bodrum airport, has not become one long littoral of resort.
The building (7) new hotels has mainly been confined to places easily reached by then relatively (8) roads. Such ease of access has made Gumbet, near Bodrum, a busy resort, while the little fishing village of Gumusluk, 12 miles further west and only recently reachable by (9) , remains tranquil and undisturbeD．
It’s worth thinking carefully about location when planning a family (10) on the peninsulA．Choose a place that is centrally located, preferably out of earshot (11) Bodrum town’s "lively"—which means nosy—nightlife, and you can then use (12) area’s comfortably small scale to your advantage. Today’s new roads mean most places can (13) reached in under an hour by taxi or the ubiquitous dolmus-minibus.
The (14) of facilities at the Tamarisk Beach Hotel near the small village of Ortakent makes (15) a good base. The family-run hotel—rooms and suites are in two-storey buildings (16) by palm trees and flowers in terracotta pots—sits above its own sandy (17) beach, shaded by tamarisk trees and sheltered by nearby islands.
The hotel is (18) child-friendly, too. Children, from infants up to young teenagers, can take part in a (19) of games and activities that include tuition in windsurfing, dinghy (20) catamaran sailing.

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