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问题 填空题
在△ABC中，AB=3，BC=
13
，AC=4，则∠A=60°60°，△ABC的面积是3
3
3
3
．
答案

cosA=

AB2+AC2-BC2
2AB•AC
=
1
2

∴∠A=60°

∴，△ABC的面积为

1
2
•AB•AC•sinA=3
3

故答案为60°，3

3

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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单项选择题

目前引起输血后肝炎的主要的肝炎病毒为（）

A.甲性肝炎病毒

B.乙型肝炎病毒

C.丙型肝炎病毒

D.戊型肝炎病毒

E.庚型肝炎病毒
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