In his book,he explains both it means to be a scientist and science works.
A. how; how
B. what; that
C. what; how
D. how; that
网友回答
A. how; how
B. what; that
(答案→)C. what; how
D. how; that
解析：考查名词性从句。句意：在他的书里，他即解释了科学家的意义又说明了科学是如何的运作的。前空为意味作----，what的含义；后空work为不及物动词，故用how.