首页
登录
职称英语
Well-preserved wrecks abound in the Baltic, where low salinity and cold wate
Well-preserved wrecks abound in the Baltic, where low salinity and cold wate
游客
2023-12-22
10
管理
问题
Well-preserved wrecks abound in the Baltic, where low salinity and cold water slow down decay. These include the Vasa, which sank on her maiden voyage in 1628 and was raised from Stockholm Harbour in 1961. Another is the Kronan, which blew up and sank during a battle with the Dutch in 1676. Not all wrecks are now under water. Many have been found in reclaimed parts of Holland’s Zuider Zee, after the land has been drained. At Skuldelev in Denmark a group of five Viking ships, sunk to form a blockage at the entrance to a fjord.
Although they have to work in a hostile environment, underwater archaeologists follow the same principles as their counterparts on land. A site must first be surveyed. This is done with tape-measures and grids using simple geometry, supplemented by photography, video, and geophysics. The aim is to produce an analytical map so that the wreck can be assessed. Often this will enable archaeologists to record the site and interpret its significance without having to disturb it. Only in exceptional cases are historic shipwrecks excavated, and their contents recovered.
Well-preserved wrecks have usually reached a state of equilibrium with their environments. Having survived for centuries in this state, they will probably remain in much the same condition for centuries to come. But if they are disturbed, the stability which has protected them will be broken. Archaeologists normally excavate shipwrecks only if they are under some kind of threat—a shift in the environmental balance, perhaps, or plans to dredge a harbor entrance where historic sites are known to lie. An example of this kind of "rescue" excavation is provided by the Cromwellian warship Swan wrecked in 1653 off Mull, which is now threatened by seabed erosion.
Very occasionally archaeologists excavate wrecks which are not under threat to recover them and their contents for public exhibition. Examples of these include the Swedish warship Vasa at Stockholm(1628)and the Mary Rose at Portsmouth(1545). In such cases the damage to their archaeological integrity is offset by careful records made by the archaeologists, the conservation of the ships and their contents, and subsequent publication and display.
Parts of the hull tell the marine archaeologist how the ship was designed and built. Tool-marks reveal woodworking techniques used by the shipwrights. Fragments of rigging and rope—sometimes even pieces of sails—help to show how the ship was operated by its crew. Other finds throw light on activities such as navigation, medical care, everyday crafts, food storage, cooking, and domestic routines. If the ship was a merchant vessel parts of its cargo may have survived, perhaps revealing where it came from. Warships contain evidence of the weapons they carried. Above all, items of clothing and personal possessions bring us into immediate contact with people who lived and died long ago. [br] What does the author imply by stating "...the damage to their archaeological integrity is offset.." in paragraph 4?
选项
A、With careful conservation of the ships and their contents, shipwreck should always be recovered.
B、The Swedish warship Vasa at Stockholm and the Mary Rose at Portsmouth are good examples to reveal ship design and building.
C、In exceptional cases, the excavations of wrecks which are not under threat can be justified.
D、The shipwrecks can be recovered without changing its connections with the sites.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3295938.html
相关试题推荐
Well-preservedwrecksaboundintheBaltic,wherelowsalinityandcoldwate
Well-preservedwrecksaboundintheBaltic,wherelowsalinityandcoldwate
Well-preservedwrecksaboundintheBaltic,wherelowsalinityandcoldwate
Well-preservedwrecksaboundintheBaltic,wherelowsalinityandcoldwate
Well-preservedwrecksaboundintheBaltic,wherelowsalinityandcoldwate
TheJapanesehavetwowordsforthemoderndepartmentstoresthataboundin
随机试题
【S1】[br]【S4】D)。空格处单词位于介词for之后,应填入一个名词。该句意为:婴孩是通过观察其他孩子和大人来获取周围世界的信息,由此可知D)cue“
城市批次用地的土地勘测定界的工作底图一般用( )。A.宗地图 B.宗地草图
关于站姿作业和坐姿作业的正确描述是A.人体在采取站姿时,运动比较灵活,特别适合较
BD90×5×4000玻璃纤维增强塑料管其结构尺寸为()。A.内径90mm
可以服用短效口服避孕药的情况是A.甲状腺功能亢进患者 B.阴道分泌物增多患者
环境质量与环境价值的关系是( )。A.环境质量好的地方环境价值一定高 B.环
—束自然光通过两块叠放在一起的偏振片,若两偏振片的偏振化方向间夹角由α1转到α2
甲发现一头牛在自家田里吃麦苗,便将其牵回家喂养,后牛生病,甲请来兽医为其治疗。一
商业银行在设计限额体系时,应综合考虑以下()等主要因素。A.能够承担的市场风险
关于硫磺软膏治疗疥疮的用法,错误的是A.成人使用10%的软膏,儿童使用5%或2.
最新回复
(
0
)