考博考试

试题来源：考博英语-24
【单选题】 The new biotechnology procedure discussed in this passage mainly concerns ______.
A．embryos
B．pigs, sheep and goats
C．commercial science
D．improvement of animal strains

参考答案：D
网考网解析：
“The new biotechnology procedure”，生物学工艺，即动物学转基因技术。commercial science的... 查看试题解析出处>>