The transmission time duration of a single pulse of radio-frequency energy is a function of the（）. -题库考试答案搜索网

The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.

单选题

2022-02-24 18:33

A、persistence
B、pulse repetition rate
C、pulse length
D、resolutio

查看答案

正确答案

B

试题解析

标签：航海仪器使用说明书

感兴趣题目

Television is a ______ in the transmission of message.

CSMA,although more efficient than ALOHA or slotted ALOHA,still has one glaring inefficiency.If the medium is busy,the station will wait for a random amount of time. When two frames collide,the medium remains （） for the duration of transmission of both damaged frames. The use of random delays reduces the probability of（）. For（）frames,compared to propagation time,the amount of wasted capacity can be considerable.This waste can be reduced if a station continues to listen to the medium while（）.The maximum utilization depends on the length of the frame and on the（） time; the longer the frames or the shorter the propagation time，the higher the utilization..

To make sure of getting the full advantage of a favorable current，you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?（）

In data communication, data link is those parts of two data terminal equipments that are controlled by a protocol along with the(71) data circuit, which together enable data(72). So-called protocol means, in short, a set of rules that determines the behavior. of functional units in achieving communication.Data circuit, however, consists of a pair of(73) transmission channels that provides a means of two-way data transmission. Between data switching exchanges, the data circuit may or may not include data circuit-terminating equipment (DCE), depending on the type of(74) used at the data switching exchange. Between a data station and a data switching exchange or data concentrator, the data circuit includes the DCE at the data station end, and may include equipment(75) to a DCE at the data switching exchange or dam concentrator location.

If there is a strike or lock-out affecting the cargo on or after vessel’s arrival at port of discharge and the same has not been settled within 48 hours，Receivers shall have the option of keeping vessel waiting until such strike or lock-out is at an end against paying half demurrage after expiration of the time prescribed for discharging or ordering the vessel to a substituting port．The “same” refers to（）.

The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.

The transmission of a（）indicates that a ship is in distress and requires immediate assistance.

Ships carrying 15 or more seafarers and engaged in a voyage of more than three day’s duration shall provide separate hospital accommodation to be used（）.

The question of the duration of the transit（）primarily one of the intention of the parties.

The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.

（）estimating is a technique for estimating the duration or cost of an activity ou project using historical data from a similar activity or project.

The （） is used to measure the volume of a liquid or gas through a pipeline within any given period of time.

相关题目: An infant can recognize a lot of vowels by the time he or she is a year old.; A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.; （）estimating is a technique for estimating the duration or cost of an activity ou project using historical data from a similar activity or project.; _________ in a person’s speech or writing usually ranges on a continuum from casual or colloquial to formal or polite according to the type of communicative situation.; The attitudes or emotion of a language user in choosing a word and the influence of these on the listener or reader’s interpretation of the word form ___ of a word.; The tone of the article()the writer’s mood at the time.; According to Hedge, a connotative meaning of a word refers to ‘the ___ or emotions of a language user in choosing a word and the influence of these on the listener’s or reader’s ___ of the word’; 二副管理航海图书资料的职责是：（）I、负责管理、登记“航海仪器和航海图书资料清册”；II、管理各种航海仪器技术说明书和图纸；III、收到航行通告或警告后，应在最短时间内登记海图卡片并改正；IV、负责保管作为少事证明的海图，以备海事调查; In the process of communication requirement analysis, the project manager should consider the number of potential communication channels or paths as an indicator of the complexity of a project's communication. According to Metcalfe's Law, a project with 10 stakeholders has（）potential communication channels.; The range of a SSB transmission is MOST affected by（）.; When a teacher says "Next，please pay attention to the time of arrival and departure of the planes in the recording ." he / she intends to the develop student“s skill of___.; Calibration Stations give special transmissions for the calibration of ship’s（）.; The unit of duration of a dash in Morse Code is（）.; For the bus, all stations attach, through appropriate hardware()known as a tap, directly to a linear transmission medium, or bus.; A time diagram is a diagram on the plane of the（）.; The Urgency Signal（）indicates that the station calling has a very urgent message to transmit concerning the safety of a ship or aircraft，or of some person on board or within sight.; If the state of the goods at the time they were handed over to the consignee has been the subjectof a joint survey or inspection by the parties，notice in writing（）be given of loss or damage ascertained during such survey or inspection.; If he is a common carrier，he is absolutely responsible to the owner of the goods carried （）any loss or damage to them unless caused by an Act of God or the Queen’s enemies，or the inherent vice in the goods themselves，or the negligence of the owner of the goods，or a general average sacrifice.; During loading or discharging，where the delay is due to the Shipowner’s fault，or that of his servants or agents acting within their authority，the time actually delayed is to be（）in calculating lay days.; Lay days（）to commence after the expiry of a specified time after the giving of the notice of readiness to load or discharge.

广告位招租WX:84302438

题库考试答案搜索网

免费的网站请分享给朋友吧