Prior to reading an aneroid barometer,you should tap the face lightly with your finger to ______.(1.0)
A.expose any loose connections B.demagnetize the metal elements C.bring the pointer to its true position D.contract and expand the glass face正确答案B
Prior to reading an aneroid barometer,you should tap the face lightly with your finger to ______.(1.0)
A.expose any loose connections B.demagnetize the metal elements C.bring the pointer to its true position D.contract and expand the glass face正确答案B
