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【单选题】
当两个以上标签同时应答或者一个标签应答未完成,另一个标签开始应答,这种现象称为( )
A.
标签碰撞
B.
天线碰撞
C.
ALOHA碰撞
D.
二碰撞
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【单选题】。船舶导航雷达工作时需要对水速度,也需要对地速度,其中提供对地速度的传感器包括 ( )
A.
GPS、计程仪、AIS
B.
GPS、AIS、 ECDIS
C.
计程仪、罗经
D.
GPS、雷达、计程仪
【判断题】Our products have been enjoyed popularity in Latin American markets.()
A.
正确
B.
错误
【单选题】中性点经消弧线圈接地系统发生单相接地故障时,非故障相对地电压
A.
不变
B.
大于相电压小于线电压
C.
大于零小于相电压
D.
为零
【单选题】肺炎检球菌在检床上主要引起下列何检疾病
A.
检胸
B.
大性肺炎叶
C.
肺检检化
D.
肺检检
E.
支管炎气
【单选题】We can make a conclusion that this passage is
A.
about how to drive
B.
about traffic laws
C.
a driver guide in Britain
D.
an international drive guide
【判断题】软切换是同频之间的切换,软切换的目标小区与原小区必须属于同一RNC
A.
正确
B.
错误
【单选题】What conclusion can we make about mass-production?
A.
Many people are engaged in production.
B.
The cost of production is lowered.
C.
Goods produced are of low quality.
【判断题】软切换是同频之间的切换,软切换的目标小区与原小区必须属于同一RNC
A.
正确
B.
错误
【单选题】What conclusion can we make from the passage?
A.
Building roads without machinery was almost impossible 2,000 years ago.
B.
It took a long time for the Romans to build roads by hand.
C.
People still use the old Roman way of building roads.
D.
Stones were used only in roads in Asia.
【判断题】中性点经消弧线圈接地系统发生单相接地故障时中性点对地电压不变。
A.
正确
B.
错误
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