《中华人民共和国标准化法》规定:我国标准分为()。
A.国家标准
B.合同标准
C.国家标准指导性技术文件
D.行业标准
E.地方标准
F.企业标准
第1题
A.ploughed
B.ploughing
C.is ploughing
D.has ploughed
第2题
第3题
The company (be) ______ in the land market since 1990 and it is now taking the lead in this field.
第5题
The Moller Skycar is a helicopter and can take off and land vertically.
A.Y
B.N
C.NG
第6题
Land can be polluted by ______ from agriculture.
A.heavy metals
B.slurry from livestock
C.pesticides and nitrate-poor fertilizers
D.rubbish
第7题
A、people should exploit the land as much as they can
B、the land belongs to people who cultivate it
C、the land is the creator of people
D、people are a part of the land
第8题
第9题
Land can be polluted by ______ from agriculture.
A.heavy metals
B.pesticides and nitrate-poor fertilizers
C.slurry from livestock
D.rubbish
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