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【单选题】
水准测量过程中,当精平后,望远镜由后视转到前视时,有时会发现符合水准气泡偏歪较大,其主要原因是( )。A.
管水准器轴不平行于视准轴
B.
竖轴与轴套之间油脂不适量等因素造成的
C.
圆水准器整平精度低
D.
圆水准器轴不平行于仪器的竖轴
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皮皮学刷刷变学霸
举一反三
【判断题】An artificial aid is a piece of equipment such as a whip,gireth or spur that the rider uses to backup a natural aid.
A.
正确
B.
错误
【简答题】v. to seize or take into control by force
【判断题】The natural aids that the rider uses are the hand, leg, seat,body and voice aids.
A.
正确
B.
错误
【单选题】Which of the following is not true?
A.
The rider helped the farmer.
B.
The rider didn't ask. the farmer for money.
C.
The rider wanted the farmer to help anyone else in trouble.
D.
The rider wanted some wheat.
【简答题】a___________ v. to take as a fact ; suppose
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