8.The enery source on Voyager 2 is not a nuclear reactor, in which atoms are actively broken apart; rather a kind of nuclear battery that uses natural radioactive decay to produce power.
(A)apart; rather
(B)apart, but rather
(C)apart, but rather that of
(D)apart, but that of
(E)apart; it is that of
正确答案是B.用考点not....but rather 和分号前后必须是完整的主谓结构 能选出正确答案.
但有个问题是.逗号+ but rather +后面部分 不是个完整的主谓结构啊??这样可以吗? | 
