题目内容
3.听第10段材料,回答第17至20题.17.How many topics does the report cover?
A.8.B.18.C.22.
18.What will China build up a system to promote by 2050?
A:Public security.B.New energy industry.C.Agriculture.
19.What will China further develop?
A.Technology.B.Science.C.Mineral resource.
20.What does CAS(中科院)consist of?
A.11regional branches.B.Over 100institutes.C.Both A and B.
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