._______,we keep records on all the experiments so that we may have enough data.

问题描述:

._______,we keep records on all the experiments so that we may have enough data.
A.As a whole B.As a rule C.On the average D.By all means

应该选C on the average 意思是:一般来说
如果选B,意思是:按规定,与原句意思不符
选C,意思是:一般来说,把所有试验的结果纪录下来,就能得到足够的数据了.这样说起来才通.