【单选题】
As a great innovator in American literature, Walt Whitman wrote his poetry in an unconventional style which is now called free verse, which is ______.
① lyrical poetry with chanting refrains
② poetry without a fixed beat or regular rhyme scheme
③ poetry without rhymes at the end of the lines but with a fixed beat
④ poetry in an irregular metric form and expressing noble feelings
【单选题】
______ semantics is the interface between lexicology and semantics. It is the most significant part of lexicology and is also the most robust in semantics.