Wherefore feed and clothe and save
From the cradle to the grave
Those ungrateful drones who would
Drain your sweat—nay, drink your blood
Questions:

A. Who wrote the poem What’s its name
B. Explain "drones. "
C. Interpret the passage.

珠蛋白肽链中氨基酸数目下列何项是正确的（）

A.α链142，β、δ、γ各148

B.α链141，β、δ、γ各146

C.α链140，β、δ、γ各146

D.α链138，β、δ、γ各145