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【判断题】
剂的主要成份是由多种表面活性剂复配而成的混合物，具有润湿、渗透、溶胀、乳化、分散等多种功能。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】Economists make assumptions to
A.
provide issues for political discussion.
B.
make a complex world easier to understand.
C.
make it easier to teach economic concepts and analysis.
D.
advancing their political agendas.
【简答题】信号系统通常包括三个部分:( )、( )、( )。
【单选题】Some cyclists make the _______ that traffic laws do not _______ them. It is not true, _______.
A.
assumption; apply to; though
B.
thought; apply to; however
C.
assuming; apply for; though
D.
idea; apply for; however
【判断题】Economists acting as scientists make positive statements, while economists acting as policy advisers make normative statements.
A.
正确
B.
错误
【单选题】A man has to make ______ for his old age by putting aside enough to live on.
A.
supply
B.
assurance
C.
provision
D.
adjustment
【简答题】Aah! She is 8)___. Let us take a closer look.
【单选题】Economists make assumptions to
A.
provide issues for political discussion.
B.
make a complex world easier to understand.
C.
make it easier to teach economic concepts and analysis.
D.
create policy alternatives that are incomplete or subject to criticism.
【单选题】Economists make assumptions to
A.
mimic the methodologies employed by other scientists.
B.
minimize the number of experiments that yield no useful data.
C.
minimize the likelihood that some aspect of the problem at hand is being overlooked.
D.
focus their thinking on the essence of the problem at hand.
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