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【单选题】
用矢量法表示定轴转动刚体内任一点的加速度为（）A.
v=r×ω
B.
v=r•ω
C.
v=ω×r
D.
v=-ω•r
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【单选题】When ship navigating in rough sea, the correct operation is .
A.
navigating with a low diesel engine speed
B.
navigating with a stable diesel engine speed
C.
increasing the efficiency of propeller
D.
increasing fuel injection
【单选题】如用重结晶法除去某产品中杂质，为此要选择合适的溶剂，溶剂的下列特点不可取的是（ ）
A.
杂质在溶剂中的溶解度常温时很小，加热时很大
B.
在室温时，产品在溶剂中易溶
C.
产品在溶剂中的溶解度随温度升高而迅速加大
D.
在同一溶剂中，产品比杂质易溶
【单选题】When navigating using GPS，what is an indicator of the geometry of the satellites that your receiver is locked onto ().
A.
Horizontal Dilution of Precision
B.
Selective Availability
C.
Doppler Shifting
D.
Precision Coding
【单选题】1990年,17岁的山东少女齐玉苓参加了中专升学考试,考上某商业学校。但其录取通知书被同学陈xx领走。陈xx以齐的名义到该商业学校报到就读。其后,齐玉苓回家务农,而“假齐玉苓”陈xx毕业后分配至当地银行工作。1999年,齐得知真相后,将陈xx及相关单位告到了法院,要求被告停止侵害、赔偿损失。在本案中,被告陈xx的行为侵犯了原告齐玉苓的何种宪法权利? ( )
A.
身份权
B.
姓名权
C.
受教育权
D.
劳动权
【单选题】When navigating a vessel，you（）.
A.
can always rely on a buoy to be on station
B.
can always rely on a buoy to show proper light characteristics
C.
should assume a wreck buoy is directly over the wreck
D.
should never rely on a floating aid to maintain its exact position
【单选题】When navigating a vessel，you（）.
A.
Can always rely on a buoy to be on station
B.
Can always rely on a buoy to show proper light characteristics
C.
Should assume a wreck buoy is directly over the wreck
D.
Should never rely on a floating aid to maintain its exact position
【单选题】When ship navigating in rough sea, the first measure taken by the chief engineer to prevent the overload should be .
A.
cleaning fuel oil, lubricating oil and seawater filter
B.
reducing fuel feeding of the main engine appropriately or reducing the pitch angle of propeller
C.
using low sea chest
D.
closing the skylight and the ventilation opening, which doesn’t affect the normal work of equipments
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