In this passage, the word wheels has a literal meaning and an idiomatic meaning. Explain how the meanings differ.

Explanation:

Note that idioms are expressions (words or sentences) that are used figuratively to communicate ideas in English.

For example, if in a passage one character John tells another Peter that 'I'm all ears, the word ear mentioned by John is an idiomatic expression that means he has given the other character his full attention. If you were to take it literally it would mean he is saying he is an ear.

- "the basic difference between keywords and subjects is that subjects (or "subject headings") have been predetermined, while keywords have not. a keyword is an easy place to start because you can use any word that seems to fit your search; this is called "natural language" searching."

impartial means: treating all rivals or disputants equally; fair and just.

i would say that impartial is agreeing with something, because impartial means to treat your rivals, arguments, and reasoning equally and fair. so if you rival says something, agreeing on it means you did the impartial.