An electronic depth finder operates on the principle that（）.
A . radio signals reflect from a solid surface
B . sound waves travel at a constant speed through water
C . radar signals travel at a constant speed through water
D . pressure increases with depth
相似题目
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纵深防御 defence in depth
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当你使用“新Finder窗口”菜单命令创建一个新窗口时，可能显示的目录内容是（）。
A . A、“电脑“目录
B . B、“系统“目录
C . C、“个人“目录
D . D、“用户“目录
E . E、“文件”目录
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If the electronic chart is part of an ECDIS,it must display the minimum data required by IMO/IHO,to include all of the following EXCEPT（）.
A . hydrography
B . aids to navigation
C . tidal currents
D . regulatory boundarie
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The ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth is the（）.
A . abyssal plain
B . continental shelf
C . borderland
D . offshore terrace
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Company.com has an application that requires a serial connection for Electronic Data Interchange. What must be done to integrator the serial connection into an HACMP cluster？（）
A . Use an RS3232/422 serial Y cable.
B . Alter the device settings to 9600 8/n/1 xon/xoff.
C . Use a network based terminal server for the serial connection.
D . Nothing because HACMP does not support native serial connection fallovers.
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Finder岛斑点热是由下列哪种立克次体引起的（）.
A . 澳大利亚立克次体
B . 战壕热立克次体
C . 普氏立克次体
D . R.honer立克次体
E . 小蛛立克次体
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在系统预设的状态下，当在Finder窗口中双击其中一个文件夹图标时，将会（）。
A . A、在原Finder窗口中打开并显示该文件夹内容
B . B、创建一个新的Finder窗口并显示该文件夹内容
C . C、在原Finder窗口中打开并显示“个人”目录内容
D . D、创建一个新的Finder窗口并显示“个人”目录内容
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在Finder中将打开的应用程序窗口隐藏，下列哪些说法是正确的？（）
A . A、在应用程序菜单下选择“隐藏„”
B . B、单击窗口中的黄色最小化按钮
C . C、双击应用程序窗口标题栏中部
D . D、按住Option键，单击Dock中的应用程序图标
E . E、都不正确
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Finder岛斑点热是由下到哪一种立克次体引起的（）
A . 普氏立克次体
B . 澳大利亚立克次体
C . 战壕热立克次体
D . R.honer立克次体
E . 小蛛立克次体
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Jitter is an unwanted variation of one or more characteristics of a periodic signal in electronics and telecommunications and（）refers to call issues that cause variations in timing or time of arrival.
A . echo
B . jitter
C . packet loss
D . digitized sampling
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59. An electronic chart system meeting IMO specifications for complying with chart carrying requirements is an ______.
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Aton, an electronic comany, ________________ from China to Viet Nam last year due to the increaing work labor expenses.
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The speed with which an electronic computer works relies on______.
A．programer
B．instructions
C．electronic circuits
D．vaccum tubes
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The Weddell seal of Antarctica can dive to a depth of about, 1,600 feet and remain submerged for as long as an hour and ten minutes.
A．underwater
B．fearless
C．unconscious
D．breathless
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Besides the electrons, an atom also contains positive electrical particles______total charge must be equal to that of the electrons.
A．which
B．that
C．whose
D．of which
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An electronic device has been developed to measure the weight of certain Martian particles．
A. Right
B. Wrong
C. Not mentioned
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Which of the four quantum numbers determine the energy of an electron in a hydrogen atom （）
A．n
B．l
C．m l
D．m s
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______is a poem by William Carlos Williams that centered in an in-depth look at the process of modernization and its effects.
A．Paterson
B．Red Wheelbarrow
C．The Widow"s Lament in Springtime
D．Sour Grapes
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Watson and her family insist she is an experienced and capable sailor who has studied navigation, electronics and m_____ safety procedures. (naval, sea)
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An ebook（also referred to as an electronic book，eBook，or e-book)is a digital version（版本)
An ebook(also referred to as an electronic book，eBook，or e-book)is a digital version(版本)of a print book that you download and read. But if you want to read an ebook, you must have an Ebook Reader, which is a kind of free software used by your computer. Make sure you have installed the appropriate Reader before you download your ebook from the Internet. The software allows you to turn the words on the screen into the size you like. It also helps you turn pages and change your viewing options(计算机屏幕上的阅读选择). Ebooks are a fun alternative to regular books. You can download them to any computers and create your own library of hundreds of titles. If you load them onto your portable computer，you can take them with you when you travel. Some ebooks are even interactive! Best of all，when you order an ebook，there is no waiting and no shipping charges. The amount of time it takes to download your ebook depends on the speed of your connection and the size of your ebook. From this passage，we learn that an ebook___________.A.can be found in any library
B.can be read directly from the Internet
C.can be read by any one who has a computer
D.can be read when special software is installed
From this passage，we can learn that______________.A.you can read an ebook on a laptop when you travel
B.you Can order an ebook using the Ebook Reader
C.the ebooks ordered have to be shipped to you
D.it takes a lot of trouble reading an ebook
Which of the following statements is TRUE？A.An ebook is ordered in print book is.
B.The size of the words in an ebook cannot be changed.
C.The downloading time is decided by the ebook’s size.
D.There is less fun reading an ebook than a print book.
The Ebook Reader is used for___________.A.reading an ebook you’ve downloaded
B.turning a print book into a digital version
C.downloading an ebook from the Internet
D.copying an ebook onto a portable computer
The passage is mainly about_______________.A.a better way to download an Ebook
B.a new kind of book—the Ebooks
C.the new version of Ebooks
D.the fun of reading Ebooks
请帮忙给出每个问题的正确答案和分析，谢谢！
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In order to approve a project, management using simple, as well as complex, sophisticated tools to determine how the project fits into it’s strategic plan. When the project selection includes an in-depth analysis, using complex, sophisticated tools, is os considered to be part of what project phase？
A.Implementation
B.Termination
C.Conceptual
D.Operational
E.None of the above
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As an experienced technician, you are responsible for Technical Support in your company. One of the trainees is asking you some quest|ons on the basis of the following output information. He is wondering, as to interface Fa0/0, assuming that the queue depth value for class "newclass" reaches 32, how many packets will be dropped concerning dscp afll traffic？（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/8c4e1542d98c7c3a93a8829182d77b66.jpg' />
A. All Packets will be dropped
B. One out of Ten packets will be dropped
C. No Packets will be dropped until queue depth reached 256
D. Packets will be dropped according to the exponential weight setting
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有关Webof Science的作者甄别检索Author Finder以下说法不正确的是：（)
A、为避免作者检索中的误检
B、在检索过程中有作者所在学科和单位的选择
C、在检索过程中有作者所获基金资助的项目名称的选择
D、可输入作者姓名，选学科，选作者单位
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下列有关路径寻找器（Path Finder）的描述正确的是：（）。
A．PathFinder命令执行后产生的路径可能是复合路径
B．对于包含有渐变网格的物体不能执行PathFinder命令
C．所谓path Finder就是用来寻找已经绘制的各种性质的路径
D．在Path Finder中命令中可以对图形进行补漏白操作
