在我国，会计工作的主管部门是（）。

ken by wedge or tapping and not by increasing the load on the applianceAccording to this sentence, .

A.the lifting appliance can always lift the freight within its rated load

B.attention should be paid in order not to break the wedge when lifting cargo

C.sometimes the lifting work needs other assistance other than the lifting appliance

D.lifting work should be done with every part fit, tightness or adhesion

The preventer guy，as used on a conventional yard and stay rig，______．

A.Is rigged at an angle of 70° to 90° from the guy it assists

B.Takes the strain imposed on the schooner guy when burtoning cargo

C.Is rigged when lifting cargo that exceeds the SWL of a single whip

D.Should take the strain if the regular guy parts

ch of the following precautions should be observed？

A.Keep a load on the hoist until all personnel are finished working

B.Set the load on a movable dolly when transportation may be needed

C.Have one man keep a hand on the load to steady it

D.Insure that the lifting gear capacity is not exceeded

Elastic strain()

A．is strain thatpermanently remains,when the lvadcausing it is removed

B．occurs below the proportional limit

C．is also known as permammt deformation

D．none of the above

A. lifting capacity of the winch

B. location of the boom

C. position of the guy

D. weight of the load

For any given pedestal crane，when the boom is lengthened，the lifting capacity is ______．

A.unchanged

B.increased

C.eliminated

D.decreased

Strain()

A．occurs when a force is applied to a material

B．has units of Newtons／Newtons

C．occurs only at room temperature

D．all of the above

emains plane while radial lines rotate. This causes a () within the material that varies () along any () line.

A、shear strain; linearly; radial

B、normal strain; linearly; radial

C、shear strain; nonlinearly; radial

D、shear strain; nonlinearly; longitudinal