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【单选题】
甲醛、乙醛、丙酮三种化合物可用( )一步区分开。A.
NaHSO3试剂
B.
试剂(Schiff's)
C.
托伦试剂(Tollen)
D.
试剂(Fehing)
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反馈参考答案：
举一反三
【单选题】某开发项目其现金流量如下表所示,已知基准收益率为10%,其内部收益率为( )。 年份 0 1 2 3 4 5 现金流人(万元) 0 0 300 300 300 300 现金流出(万元) 500 50 50 50 50 50
A.
14.81%
B.
16.60%
C.
19.49%
D.
22.14%
【简答题】The American Dream is a national ethos (精神特质) of the United States. The term is used in many ways, but it essentially is an idea that suggests that anyone in the US can succeed through hard work and h...
【单选题】How does the professor introduce the lecture topic?
A.
By listing the top producers of maple syrup.
B.
By correcting a common misconception about maple syrup.
C.
By reminding the students of the topic from last class.
D.
By asking the students to define a related term.
【简答题】Translate the following paragraph into Chinese. The American Dream is a national ethos( 精神特质 )of the United States. The term is used in many ways, but it essentially is an idea that suggests that anyo...
【多选题】会议纪要在开头部分要先写明会议的基本情况，它包括（ ）。
A.
会议召开的根据、目的
B.
会议名称、议题、成果
C.
时间、地点、与会范围(人员)
D.
讨论经过和各方面意见
【单选题】What is the discussion mainly about?
A.
Regions that are known for their maple syrup industries.
B.
The production of maple syrup.
C.
The process by which maple trees produce sap.
D.
The history of the maple syrup industry.
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