What does the word "murky" （Para. 3) probably mean？A．Unclear.B．Significant.C．Obvious.D．Exa

What does the word precursor in the context in the second paragraph mean？

What does the word "defensive" mean in the passage？ 查

What does the author mean by $quot;What does the author mean by "context"？<br/>A．It refers to long-term memory.<br/>B．It refers to a new situation.<br/>C．It refers to a store of knowledge.<br/>D．It refers to the search engine.<br/

Why does the author quote the example of naturalist John Muir？A．Because he was one of the

What does the word“bottlenecks”(Para.2)mean in th

What does the word“defensive”mean in the passage?