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【单选题】
下列试剂中可以鉴别丙烯与环丙烷的是（ ）A.
高锰酸钾水溶液
B.
溴的四氯化碳溶液
C.
硝酸银的氨溶液
D.
三氯化铁水溶液
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Why can't the tour guide interpret the scenes and views in details ( )
A.
because the bus travels quickly
B.
because tourists have no interest in them
C.
because the tour guide forget them
D.
because there is no arrangement
【单选题】The three climbers can employ a guide to ____ them on their way up the mountain.
A.
guide
B.
conduct
C.
lead
D.
bring
【单选题】在采用图解法确定产品保本点时,保本点是保本图中()所对应的销量
A.
变动成本线与销售收入线的交点
B.
固定成本线与销售收入线的交点
C.
总成本线与销售收入线的交点
D.
变动成本线与总成本线的交点
【单选题】This computer guide will show you_______ in other fields.
A.
how can it be used
B.
when can it be used
C.
how it can be used
D.
which can be used it
【简答题】In organized exercise programs, exercise therapists or physiologists can expertly guide an exerciser to the proper way to increase his or her ______ without risking injury or fatigue.
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