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问题 填空题

写出下列溶液中溶质的化学式：

（1）医用酒精______ 

（2）澄清石灰水______

（3）双氧水______ 

（4）大理石和稀盐酸恰好完全反应后的溶液______．

答案

（1）医用酒精是酒精溶于水形成的，溶质是酒精，化学式是C2H5OH；

（2）澄清石灰水是氢氧化钙的水溶液，溶质是氢氧化钙，化学式是：Ca（OH）2；

（3）双氧水是过氧化氢的水溶液，溶质是过氧化氢，化学式是：H2O2；

（4）大理石和稀盐酸反应生成氯化钙、水、二氧化碳，所以溶质是氯化钙，化学式是：CaCl2．

故答案为：（1）C2H5OH；（2）Ca（OH）2；（3）Ca（OH）2；（4）CaCl2．

选择题

已知函数f（x）=（x2-3x+2）lnx+2008x-2009，则方程f（x）=0在下面哪个范围内必有实根（　　）

A．（0，1）

B．（1，2）

C．（2，3）

D．（2，4）
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单项选择题

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.

Why does the groundwater from the north finds its way into the canyon, but the water from the south doesn’t

A．Because there are fractures in the rocks in the south.

B．Because the southwest part of the underlying rock beds are a bit lower than those in the opposite direction.

C．Because the pressure of the upper streams forces the water to flow in from the north and flow away from the south.

D．The reason is not mentioned in the passage.
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