网友您好, 请在下方输入框内输入要搜索的题目:
题目内容
(请给出正确答案)
单选题
播发一份1000字符的-NAVTEX报文,所需的时间约为()分钟
A
9
B
10
C
5
D
2.5
参考答案
参考解析
解析:
暂无解析
更多 “单选题播发一份1000字符的-NAVTEX报文,所需的时间约为()分钟A 9B 10C 5D 2.5” 相关考题
考题
单选题When collecting condensation for drinking water,().A
a sponge used to mop up and store condensation must be kept salt freeB
only condensation on the bottom of the canopy should be collectedC
it should be strained through a finely woven clothD
chlorine tablets should be used to make it drinkable
考题
单选题When did you check the contents of C02 cylinders().A
by countingB
by calculatingC
by weighingD
by filling
考题
单选题Weather conditions in the middle latitudes generally move().A
EastwardB
WestwardC
NorthwardD
Southward
考题
单选题()may be a warning for an approaching storm.A
The persence of cirrus cloudsB
The low-hanging stratus cloudsC
The altocumulus cloudsD
The massive cumulus clouds
考题
单选题用缆注意事项中,下述哪一点不正确?()A
吹开风大时,首、尾缆与码头交角宜大一点,这样有利于抵抗吹开风的影响B
顶流强时其首、尾缆与码头交角也宜大一些C
系浮筒时,要求各缆受力均匀,但回头缆不宜吃力D
吹开风强时,一般先带首横缆,并尽快收紧
考题
单选题While cranking out a quadrantal davit,slippage of the quadrant due to excessive wear or failure of the teeth in the quadrant will cause the().A
Davit arm to pivot on the traveling nut and the head to fall outboardB
Traveling nut to lock up in place on the worm gearC
Limit switch to engage and hold the traveling nut in positionD
Winch brake to lock in position and prevent lowering the boat
考题
单选题A circuit breaker differs from a fuse in that a circuit breaker ().A
melts and must be replacedB
is enclosed in a tube of insulating material with metal ferrules at each endC
gives no visual indication of having opened the circuitD
trips to break the circuit and may be reset
考题
单选题30℉时轻柴油的密度是0.865,每1℉时密度修正系数是0.00037,试问如不考虑标准密度测试条件,在84℉时密度是()。A
0.845B
0.856C
0.853D
0.839
考题
单选题船舶电站修理后,应对舵机的应急电源进行试验,按规范规定,在主电源失电后应检查下列项目()。 a.能自动转换到应急电源; b.保证舵机至少连续工作30min; c.在进行操舵试验时供电稳定、运行可靠性; d.保证舵机至少连续工作15min。A
a+cB
a+b+cC
a+c+dD
a+d
考题
单选题两机动船在下列哪种情况时,不一定符合对遇局面:() Ⅰ、一船看到另一船前后桅灯成一直线 Ⅱ、在相反航向上,且在同一航向延长线上对驶 Ⅲ、在航向交角小于半个罗经点的航向上对驶A
ⅠB
Ⅰ、ⅡC
Ⅱ、ⅢD
Ⅰ、Ⅱ、Ⅲ
考题
单选题In cleaning up an oil spill, the use of straw or reclaimed paper fibers would be an example of which type of oil removal?()A
Chemical agent removalB
Mechanical removalC
Absorbent removalD
None of the above
考题
单选题Halon extinguishes a fire by().A
breaking the chain reactionB
smothering the fireC
cooling the fireD
coating the fule with a nonflammable surface
考题
多选题对发信机的输出回路调谐的目的是()A调节发信机工作频率B使输出回路对工作频率调谐C调节发信机的工作带宽D使输出回路谐振阻抗与末级功放匹配E调节发信机发射功率F调发信机工作模式
热门标签
最新试卷