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【单选题】
在次数分布中,频率是指( )A.
各组的单位数
B.
各组的单位数相互之比
C.
各组分布次数与频率之比
D.
各组分布次数与总次数之比
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举一反三
【单选题】Which of the following information is not necessarily exchanged between the master and the pilot before the pilotage commences.
A.
Local conditions and rules
B.
Number of crew on board
C.
Navigational procedures
D.
The ship' characteristics
【单选题】Which of the following statements is true about VHF? ____
A.
The VHF is used to bridge short distances. VHF
B.
With VHF, listening and speaking can be done simultaneously.
C.
When you wish to speak, you release the button.
D.
When you wish to listen, you push the button.
【单选题】Which of the following statements is NOT true?
A.
When they were climbing the mountain, two of them fell into the valley.
B.
The firemen arrived half an hour later.
C.
Mr. Zhang hurt his head..
D.
The accident happened on Mount Hua, Shanxi.
【单选题】Of the following sentences, which has the most emphatic theme?
A.
As the position stands, the unemployed are without any attraction of the snobbish.
B.
The unemployed are, as the position stands, without any attraction of the snobbish.
C.
As the position stand, the unemployed are without any attraction of the snobbish.
D.
As the position standing, the unemployed are without any attraction of the snobbish.
【单选题】Whicb of the following numbers indicates a ship station MMSI?
A.
003372694.
B.
623944326,
C.
030356328.
D.
3384672.
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