lack of和a lack of的区别?

lack of和a lack of的区别? lack of 和 a lack of的区别 lack of 和lack for 的区别? lack 和lack of 有什么区别? lack of sth 和 a lack of 的区别最好用例句说明一下 lack的用法请问a lack of、be lacking in和lack for用法上有什么区别? lack 的用法a lack of、be lacking in和lack for用法上有什么区别吗?尤其是lack of 和lack in 用法上的区别?最好给例句^^^ a lack of 和lack of 有什么区别?这俩个词组中lack都是名词,但是有什么区别呢? a lack of a lack of 与 no lack of 的区别那么补充一句：lack in 怎么用呢？ be lack of和be lack in区别 lack相关短语的区别,be lack of,be lacking in ,lack sth,a lack of sth,等等并造句,如果还有其他相关短语,也请列出, Lack anything,lack of 高中英语lack和lack of Those people ______a general understanding of hte present situation.A.lack of B.are lacking of C.lack D.are in lackkey:c 我选A 请讲一讲这道题里的lack 和lack of的区别,为什么这道题必须选C 【跪求】lack of 和 a lack of的用法,如题, the lack of和lack of有区别么they didnt finish the experiment successfully because of ( ) courageA lack inB the lacking ofC lack ofD the lack of lack 和lack of可以混用? a lack of和the lack of的区别 还有in a cheat和in the cheat的区别 急用 谢谢各位了 lack of