they demand the numbers are positive,that（it） limits the use of their method.请问上句中的that 和 it 哪个用的对?请简要说明一下.
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都不对应该用which引导非限定性定语从句
逗号后面的从句是个非限定性定语从句,不能用that
it也不行,因为两个句子之间没有比如说and之类的连词,就不能拿逗号直接隔开两个句子,而应该用句号隔开.
所以这个句子有两种说法.
they demand the numbers are positive,which limits the use of their method.
they demand the numbers are positive.It/That limits the use of their method.