Idiom
To pour oil in troubled water

To foment trouble
To calm a quarrel with soothing words
To add to the trouble
To instigate

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Idiom
To throw up the sponge

To become utterly disappointed
To maintain grit and enthusiasm until the end
To offer a challenge
To surrender or give up a contest

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Idiom
Select the correct statement about active and passive immunity.

A vaccination is an example of the introduction of passive immunity into the body
Active and passive humoral immunity are both mechanisms of adaptive immunity that useantibodies
Immunological memory is established by passive immunization
The antibodies utilized in active immunity are acquired from another organism

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