____some doubt among scientists about the cause of cancer. A

doubt of doubt about cancer will become the world's leading cause of death. 英语翻译Scientists doubt the value of traditional knowledge beca the scientists researched the cause of the disease是什么意思 -------a certain doubt among the students as to the necessit ---There existed----a certain doubt among the students as to 求详解.＿remains a certain doubt among the ... doubt about和doubt of Scientists are still ( ) a cure for cancer .A.searching of B although the cause of cancer ___ ,we do not yet have any pra Cancer is the leading cause of his d_______.（根据首字母填空） scientists didn't know much about lung cancer——.