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【单选题】
下列实验方案不合理的是( )A.
除去乙烷中含有的乙烯：将气体通入溴水中，洗气
B.
检验蔗糖是否水解：取1mL 20%的蔗糖溶液，加3～5滴稀硫酸。加热5min后取少量溶液，加氢氧化钠溶液调溶液pH至碱性，再加入少量新制备的Cu(OH) 2 ，加热3～5 min，观察实验现象。
C.
除去乙酸乙酯中的乙酸：加入浓硫酸和乙醇，加热
D.
鉴别己烯和苯：将溴的四氯化碳溶液分别滴加到少量己烯和苯中
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【简答题】7The Gs of Wrath
【简答题】What do you do when you lie in bed in the morning, feeling slight sick? On one hand, you know you are not very ill, but on the 【M1】 ______. other hand, you do feel as well as you usually do. Do you go...
【单选题】What does the writer say is an additional problem for entrepreneurs in the fourth paragraph?
A.
They rely on management systems that are out of date.
B.
They will not adept measures that provide long-term solutions.
C.
They have little confidence in the business advice that is available.
D.
They de not take market changes into account when drawing up business plans.
【单选题】What does the writer say is an additional problem for entrepreneurs in the fourth paragraph?
A.
They rely on management systems that are out of date.
B.
They will not adopt measures that provide long-term solutions.
C.
They have little confidence in the business advice that is available.
D.
They do not take market changes into account when drawing up business plans.
【单选题】By the late 7the century, ____ became the dominant religion in England.
A.
Celtic Christianity
B.
Anglo-Saxon Christianity
C.
Germanic Christianity
D.
Roman Christianity
【简答题】光合作用可分为光反应和暗反应两个过程,发生的场所分别是( )和( )。
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