首页
登录
职称英语
In a little-known part of the counter-terrorism world, one of the most eff
In a little-known part of the counter-terrorism world, one of the most eff
游客
2024-08-19
6
管理
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 US 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 manmade 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. [br] 【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,故答案用现在完成时。
转载请注明原文地址:https://tihaiku.com/zcyy/3727108.html
相关试题推荐
Inalittle-knownpartofthecounter-terrorismworld,oneofthemosteff
Inalittle-knownpartofthecounter-terrorismworld,oneofthemosteff
Inalittle-knownpartofthecounter-terrorismworld,oneofthemosteff
Inalittle-knownpartofthecounter-terrorismworld,oneofthemosteff
Inalittle-knownpartofthecounter-terrorismworld,oneofthemosteff
Inalittle-knownpartofthecounter-terrorismworld,oneofthemosteff
Inalittle-knownpartofthecounter-terrorismworld,oneofthemosteffec
Inalittle-knownpartofthecounter-terrorismworld,oneofthemosteffec
Inalittle-knownpartofthecounter-terrorismworld,oneofthemosteffec
Inalittle-knownpartofthecounter-terrorismworld,oneofthemosteffec
随机试题
[originaltext]W:Hello,Patrick.Whatareyoubusydoing?M:Nothingserious.W
Shesaidthatshewouldbehereatseveno’clock.Butshedidn’t___________unt
[originaltext][19]Psychologicalresearchshowsweconsistentlyunderestimat
营养不良主要是指哪些营养素的缺乏A.热量+糖类 B.热量+维生素 C.热量+
经产妇40岁,妊娠33周,因胎儿脑积水,要求引产入院,12年前曾行剖宫产分娩一女
患者李××,男性,77岁,因反复双下肢凹陷性水肿20余年,发作性呼吸困难、心悸7
旅行社对保险公司请求赔偿或者给付保险金的权利,自其知道保险事故发生之日起( )
由肾上腺髓质分泌的激素A.生长素 B.皮质醇 C.肾上腺素 D.甲状腺激素
我们对待历史和文化,应该坚持()的态度。中国历史悠久、文化精深,古代名人众多,
某市区房地产开发公司为一般纳税人,2020年发生相关业务如下: (1)2015
最新回复
(
0
)