一道语法题

datatest

语法分册P111 NO3
The energy 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.
(B)apart,but rather
(D)apart,but that of
答案是B,但我认为不能说sth is a kind of.......应说sth is that of a kind of sth
sth 不能和一类事物并列

primefang

原句的意思是,  A is not B , rather a kind of C

D> 中that 没有指代对象.

而且,that of a kind of 感觉上罗锁

brigittew

sth is a kind of is correct usage here, seldom see the usage of that of a kind of sth, awkward expression