The geometric center of the waterplane area is called the（）.

A . phase correction B . refraction correction C . semidiameter correction D . augmentation correctio

A . the border flange’s excursion and flection B . the both end shafts line’s accordance C . the border flange’s flection and the both end shafts line’s accordance D . the border flange’s accordance and both end shafts flection degree

A .  Server-to-server traffic always remains in the core layer. B .  The recommended practice is for the core infrastructure to be in Layer 3. C .  The boundary between Layer 2 and Layer 3 should be implemented in the aggregation layer. D .  The Cisco Express Forwarding hashing algorithm is the default， based on the IP address andLayer 4 port. E .  Core layer should run BGP along with an IGP because iBGP has a lower administrativedistance than any IGP.

A . center of gravity B . metacenter C . center of flotation D . keel

A . Discharging weight from lower decks B . Loading weight in upper decks C . Shifting weight from lower to upper decks D . Shifting weight from upper to lower deck

A . the angle between the horizontal and the line of sight to the visible horizon B . index error C . parallax D . terrestrial refractio

A . center of gravity B . amidships station C . center of flotation D . geometric center of the waterplane area

A . the center of volume of the immersed portion of the vessel B . the center of gravity of the water plane C . that point at which all the vertical downward forces of weight are considered to be concentrated D . that point at which all the vertical upward forces of buoyancy are considered to be concentrated

A . aft perpendicular B . center of buoyancy C . keel D . center of flotatio

A . only when there is positive stability B . only when there is negative stability C . only when there is neutral stability D . at all time

A . only when there is positive stability B . only when there is negative stability C . only when there is neutral stability D . at all time

A . about which the vessel lists and trims B . which coincides with the center of buoyancy C . which，in the absence of external forces，is always vertically aligned with the center of gravity D . which is shown in the hydrostatic tables as VCB

A . center of buoyancy B . center of flotation C . center of gravity D . tipping center

A . water depth B . keel C . center of flotation D . center of buoyancy

A . center of buoyancy B . center of flotation C . uncorrected height of the center of gravity of the vessel D . center of gravity of the vessel corrected for free surface effect

A . metacentric height B . height of the righting arm C . fore and aft perpendicular D . height of the center of buoyancy

A . metacenter B . amidships C . center of flotation D . geometric center of the displaced volume

A．extend B．emphasize C．distort D．soften

A．center: vertices: B．center: vertices: C．center: vertices: D．center: vertices: E．center: vertices:

A．physical B．psychological C．professional D．sociological

A．First moments of areas and Moments of inertia B．Polar moments and Moments of inertia C．Moments of inertia and Products of inertia D．First Moments of areas and Products of inertia

A．A.dispossessed on B．B.discarded with C．C.derived from D．D.deprived af