问题 单项选择题

经过半年多的星际旅行,美国“勇气”号火星车于太平洋时间3日20时35分左右,在火星表面成功着陆,并于20时52分向地球发回第一个信息。美国宇航局宣布这一登陆计划取得成功。 美国宇航局华裔科学家沈毓贤说:“‘勇气’号登陆过程中全球共有3个联络站,分别位于西班牙马德里、澳大利亚堪培拉和美国的加利福尼亚,它们能接收全空域的通信信号,‘勇气’号外部为登陆舱,只有火星车和登陆舱都发回信号,才能证实整个登陆计划成功。”在帕萨迪纳的宇航局喷气推进实验室,监测登陆过程的数百名工作人员收到信息后一片欢腾,人们期待着“勇气”号在火星上发现水和生命存在的迹象。火星着陆系统总工程师、华裔科学家李炜钧说:“‘勇气’号登陆完全依靠自主控制,地面控制中心在紧张和悬念中希望它‘交好运”’。 “勇气”号登陆时像皮球一样在火星表面进行长达数分钟的弹跳、翻滚,直至最后落稳。它先是在耐高温表层的保护下,以大约1.9万公里的时速冲入130公里厚的火星大气层。在空气阻力作用下,它在距火星表面8公里左右时时速降至1600公里,此时直径10多米的降落伞自动打开。当火星车连同降落伞一起接近火星地面,它的外层气囊弹出,同时火箭制动发动机向地面喷出火焰,增加着陆缓冲力。在距地面12米时,降落伞绳索自动断开,被气囊包裹得严严实实的“勇气”号,像皮球一样落在火星表面弹跳、翻滚,最初弹起时有5层楼那么高,反复弹跳数10次后在距最初着陆点大约1公里的地方落稳。此时气囊内的气体自动放出,火星车看上去像被一层帆布包着。 “勇气”号着陆点选在火星上地势平缓、面积较大的“古谢夫环形山”区域,以确保成功。它着陆后将先进行一星期的设备自检,然后地面人员将操纵它在火星表面考查。收到它拍摄的图像后,如果科学家认为某块岩石有研究价值,会命令它开过去进行进一步探测。 “勇气”号的“孪生兄弟”——“机遇”号也计划于1月24日在火星着陆,这一对探测器共耗资8.2亿美元,分别在去年6月和7月飞向太空,是去年2月“哥伦比亚”号航天飞机失事后美国宇航局最大的一项太空计划。如果这一计划取得成功,将鼓舞宇航局的士气,并加速人类登陆火星的进程。

本文的标题是()。

A.“勇气”号的特征与功能

B.“勇气”号成功登陆火星

C.美国最大的太空计划

D.火星登陆计划取得成功

答案

参考答案:B

解析:

本文重在谈“勇气”号的登陆问题,详细交代了登陆的种种情况,所以选B,而A项回避了这一主要问题,CD两项又显得太宽泛。

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.

名词解释