海船船员考试
单选题The closest point of approach (CPA) of a contact on a relative motion radar may be determined（）.A immediately when the contact is noted on radarB only if the radar scope is watched constantlyC after the contact has been marked at least twiceD by an occ
题目
immediately when the contact is noted on radar
only if the radar scope is watched constantly
after the contact has been marked at least twice
by an occasional glance at the radar
相似问题和答案
第1题：
A.Molly,are you ready for the weekend speech
B.The point of speech is not totally depending on the content
C.First, you should remember to keep eye-contact with your audience.
第2题：
In(66)the strength of the carder signal is varied to represent binary 1 or 0.(67)is a system that can map a name to an address and conversely an address to an name.(68)is a three-way handshaking authentication protocol that it's packets are encapsulated in the point-to-point protocol.(69)is an approach that enables an ATM Switch to behave like a LAN switch.(70)is an guided media which is made of glass or plastic and transmits signals in the form. of light.
A．ASK
B．PSK
C．FSK
D．FDM
解析：本题主要考查调制的专业术语。ASK为幅度键控，PSK为移项键控的英文缩写，FSK为移频键控的英文缩写，FDM为频分多路复用的英文缩写。答案为A。
第3题：
A project may be defined as _____
Aan integrated approach to managing projects
Ba coordinated undertaking of interrelated activities.
Ca group of activities directed by a project manger over a life cycle
Dan undertaking with a defined starting point and defined objectives
EAll of the above.
D
第4题：
In radar plotting C.P.A is the abbreviation of ______.
A.crossing point to approach
B.fog or steady rain
C.closest point to approach
D.close point to approach
在雷达标绘中，C、P.A、是最近会遇距离的缩写。
第5题：
A barometer showing falling pressure indicates the approach of a ______.
A.high pressure system
B.low pressure system
C.high dew point
D.low dew point
气压计显示气压下降，表示低气压临近。
第6题：
The closest point of approach ( CPA ) of a contact on a relative motion radar may be determined ______.
A.immediately when the contact is noted on radar
B.only if the radar scope is watched constantly
C.after the contact has been marked at least twice
D.by an occasional glance at the radar
最近会遇点，的会遇距离在相对运动雷达显示可能被测定在接触点至少标记两次之后。
第7题：
In radar plotting CPA is the abbreviation of ________ ．
A.closest point to approach
B.close point to approach
C.crossing point to approach
D.coming point to approach
第8题：
174 A project may be defined as _____
A. an integrated approach to managing projects
B. a coordinated undertaking of interrelated activities.
C. a group of activities directed by a project manger over a life cycle
D. an undertaking with a defined starting point and defined objectives
E. All of the above
第9题：
A mark or place at which a vessel comes under obligatory entry, transit, or escopt procedure is know as ______.
A.Way point
B.Receiving point
C.Reporting point
D.Closest point
接受点是一艘船舶进入，通过或护航的一处标志或地点。
第10题：
B.2.0～3.0cpa.s
C.3.0～4.0cpa.s
D.4.0～5.0cpa.s
E.5.0～6.0cpa.s