A same meaning or not problem: OPTIONS:
- no
- yes
Central forces that are conservative can always be expressed as the negative gradient of a potential energy :
Conservative central forces can always be expressed as the potential gradient of negative energy .
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[A]: no

A same meaning or not problem: OPTIONS:
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- yes
The Stejioara River is a tributary of Barnarel River in Romania .
The Barnarel River is a tributary of the River Stejioara in Romania .
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[A]: no

A same meaning or not problem: OPTIONS:
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- yes
The dividends have increased the total return on the average equity to double , approximately 3.2 % .
The dividends have increased the total '' real '' return on average equity to the double , about 3.2 % .
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[A]: yes

A same meaning or not problem: OPTIONS:
- no
- yes
Olivella alectona is a species of dwarf sea snail , small gastropod mollusk in the Olivellidae family , the naval olives .
Olivella alectona is a species of small sea snail , marine gastropod mollusk in the family Olivellidae , the dwarf olives .
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[A]:
no