The book mentioned in this passage is written for readers who ______.
A.long for deeper understanding of science
B.are good at producing various gadgets
C.work in a storehouse of dried facts
D.are interested in popular science
第1题
A.骨骼系统
B.生殖系统
C.泌尿系统
D.消化系统
E.呼吸系统
第7题
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