What is the purpose of the limit switch on gravity davits?（）
Which of the following activities would help students develop the skill of extracting specific information?
A virtual rise in the center of gravity may be caused by（）.
A vessel behaves as if all of its weight is acting downward through the center of gravity，and all its support is acting upward through the（）.
If the vertical center of gravity (VCG) of a ship rises 1.7 feet，the righting arm (GZ) for the various angles of inclination will（）.
The distance traveled by the center of gravity perpendicular to the original course is（）.
Stability is determined principally by the location of the center of gravity and the（）.
A virtual rise in the center of gravity of a ship may be caused by（）.
A vertical shife of weight to a position above the vessel''s center of gravity will（）.
The maximum speed of lowering for a lifeboat on gravity davits is controlled by the（）.
Stability is determined by the relationship of the center of gravity and the（）.
0n a vessel,multipiying a load’s weight by the distance of the load’s center of gravity above the baseline results in a(n)（）.
The goodscomply （ ）the specifications of the sales confirmation.
The difference between the height of the metacenter and the height of the center of gravity is known as the（）.
High-speed rotating in a centrifugal purifier can produce a force （） larger than the force of gravity.
Aboard a ship，multiplying a load’s weight by the distance of the load’s center of gravity from the centerline results in the load’s（）.
In the absence of external forces，the center of gravity of a floating vessel is located directly above the（）.
The goods comply （ ）the specifications of the sales confirmation.
High-speed rotation in a centrifugal purifier can produce a force （） the force of gravity.
Specific gravity is a number representing the ratio of a mineral’s weight to the weight of an equal volume of ( ).
What’s the function of the specific words?
Once out of the earth’s gravity, the astronaut is ________ by the problem of weightlessness.
Aboard a vessel, multiplying a load’s weight by the distance of the load’s center of gravity from the mid-ship section results in the load’s ______.
