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【单选题】
建筑基坑支护采用排桩时，当排桩采用素混凝土桩与钢筋混凝土桩间隔布置的钻孔咬合桩形式时，支护桩的桩径可取为（）mm，相邻桩咬合长度不宜小于（）mm。（）A.
800～1500；200
B.
800～1500；300
C.
，1000～2000；200
D.
1000～2000；300
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【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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