单选题
The more complex a subject A
becomes
, the B
better necessary
it is to C
break it up
into a number of parts D
which
the reader can visualize.
【正确答案】
B
【答案解析】解析：better necessary一more necessary。句意：一个学科越是复杂，就越有必要将其拆分成几个不同的部分，来方便读者理解。此处为“the more…the more…”的固定搭配。