首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
In a little-known part of the counter-terrorism world, one of the most effective detection systems is a 600-pound animal【C1】____
In a little-known part of the counter-terrorism world, one of the most effective detection systems is a 600-pound animal【C1】____
admin
2023-01-16
58
问题
In a little-known part of the counter-terrorism world, one of the most effective detection systems is a 600-pound animal【C1】________works for about 20 pounds of fish a day.
Since the 1960s, the United States and a handful of other countries have trained dolphins and sea lions to detect sea mines and swimmers,【C2】________( recover) inert torpedoes (鱼雷) and to test objects used in Naval exercises.
Program officials estimate that the sea lions in the Marine Mammal Program【C3】________(recover) millions of dollars of U. S. Naval torpedoes and instrumentation【C4】________(drop) on the sea floor.
The U.S. Navy kept its Marine Mammal Program a secret until the 1990s, and this spring CNN became one of only a handful of media outlets to see firsthand 【C5】________the program works.
The program has trained about 75 Pacific bottlenose dolphins, with natural bio-sonar( 生物声呐) that track, better than any man-made device; and 35 California sea lions, with superb underwater eyesight.
Not only do these trained marine mammals track and retrieve millions of dollars in U. S. military equipment, they are also helping to save lives.
The Navy won’t disclose whether the dolphins and sea lions have effectively intercepted(拦截) terrorist【C6】________(attempt) to do harm to any U. S. facilities.
"Either way, it serves as a deterrent(遏制的) effect," says Christian Harris, operations supervisor for the program. The mammals can be deployed via C-130 cargo aircraft to perform their missions anywhere in the world within 72 hours. They have been used in exercises from Alaska to Hawaii, 【C7】________( operate ) in great temperature and environmental ranges. They also have the capability to operate off vessels.
Dolphins most recently were deployed in the Iraq war, 【C8】________( perform) mine detection and clearance operations in the Persian Gulf【C9】________(ensure) safe passage for humanitarian ships 【C10】________(deliver) aid. Some of these Iraq war "veterans" are now back home, tasked with a new mission: guarding nuclear submarines in their homeports of Bremerton, Washington, and Groton, Connecticut.
【C3】
选项
答案
have recovered
解析
本题考查动词的时态。从原文可知,海狮已经恢复了价值成百上千万美元的鱼雷和仪器,故用现在完成时。
转载请注明原文地址:https://kaotiyun.com/show/jLSD777K
本试题收录于:
D类竞赛(专科)题库大学生英语竞赛(NECCS)分类
0
D类竞赛(专科)
大学生英语竞赛(NECCS)
相关试题推荐
Thepurposeofsystemsdesignistospecifya(n)____①____,whichdefinesthetechnologiestobeusedtobuildtheproposedinfor
Thepurposeofsystemsdesignistospecifya(n)____①____,whichdefinesthetechnologiestobeusedtobuildtheproposedinfor
Thepurposeofsystemsdesignistospecifya(n)____①____,whichdefinesthetechnologiestobeusedtobuildtheproposedinfor
________themanagerwillcomeornotdoesn’tmattermuch.
"We’lldowhatwecantogetthegoods________ontime,"saidthemanagerofthecompany.
HowtoBeRespectfulofYourParentsChangingyourthoughtsandfeelingsaboutyourparentsbegratefultothem—showgra
HowtoBeRespectfulofYourParentsChangingyourthoughtsandfeelingsaboutyourparentsbegratefultothem—showgra
随机试题
腮腺位于下颌后窝咀嚼肌部皮下,解剖形态特点哪一项是错误的
损伤平面以下同侧肢体的运动和深感觉丧失,对侧肢体的痛觉和温度觉丧失称为
具有抗吞噬作用的细菌结构是
关于病菌致病因素的描述,错误的是
案情:2000年5月12日,甲、乙两厂签订购销合同。双方约定:乙厂供应甲厂洗衣机零配件5万套,每套价格10元;乙厂于同年6月10日,每月交货1万套;甲厂于签约后10天内付乙厂定金5万元;乙厂每月月底交货,甲厂收货后10天内验货付款;违约责任为未履行货物价款
当水的密度ρwt=1g/cm3时,蜡封试件空中质量与水中质量之差等于()。
在温度和湿度状况不良的城镇道路上,应设置垫层,以改善路面结构的使用性能。垫层的种类包括()。
青岛港集装箱码头桥吊队队长许‘振超用半年时间练就了“一钩净”的绝活,吊车时做到舱内起钩、旋转、落钩、变幅时都要稳、准,避免了货物撒漏,许振超的“二次停钩”也是他的绝活,就是箱子刚离地和快落地的一刹那,放慢速度,先观察后起落,这样做虽然使每次操作时间多了几秒
事实上不知道也好,因为他们已经是无可挽救的了。他自己的处境是这样的:他眼看着他们向那个深渊走去,却无法_______他们。这是多么痛苦的事!想到这里,他自己也变得忧郁了。他似乎走进了一条窄巷,找不到一个_______。外面的笑声接连地传到他的耳边,好像在讥
根据下列材料回答问题。根据《全国经济普查条例》的规定,国务院决定开展第三次全国经济普查工作:全面调查了解我国第二产业和第三产业的发展规模及布局;了解我国产业组织、产业结构、产业技术的现状以及各生产要素的构成;进一步查实服务业、战略性新兴产业和小微
最新回复
(
0
)