Will no one tell me what she sings?Perhaps the plaintive numbers

Will no one tell me what she sings?
Perhaps the plaintive numbers flow
For old, unhappy, far-off things,
And battles long ago;
Or is it some more humble lay,
Familiar matter of today?
Some natural sorrow, loss, or pain,
That has been, and may be again?
(From William Wordsworth's"The Solitary Reaper") Questions:
A. What does the phrase"plaintive numbers" mean?
B. What is the rhyme scheme of the poem?
C. What do you think Wordsworth intends to suggest in the poem?
【正确答案】：A.The mournful verses
B.ababecdd.
C.The poet suggests the timetess mystery of sorrowful humanity and its radiant beauty.