Idiom
To hit below the belt

To hit the correct mark
To harm unfairly
To work confidentially
To strike at the exact position

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Idiom
Select the correct statement about active and passive immunity.

Immunological memory is established by passive immunization
The antibodies utilized in active immunity are acquired from another organism
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

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Idiom
To take the bull by the horns

To punish a person severely for his arrogance
To bypass the legal process and take action according to one's own whims
To grapple courageously with a difficulty that lies in our way
To handle it by fierce attack

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