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【判断题】
异议处理步骤是一成不变的。A.
正确
B.
错误
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举一反三
【单选题】What was Mrs. Franks doing when the accident took place? A. Walking along Churchill A
A.
14 . What was Mrs. Franks doing when the accident took place? A. Walking along Churchill Avenue.
B.
Getting ready to cross the road.
C.
Standing outside a bank.
【单选题】关于滴定管的读数方法,下列正确的是( )
A.
自下往上读数
B.
读数时眼睛平视凹液面最高点
C.
估读值不清楚时可统一读为0
D.
滴定管读数应有两位小数,最后一位为估读值
【单选题】14 What was Mrs. Franks doing when the accident took place?
A.
Walking along Churchill Avenue
B.
Getting ready to cross the road
C.
Standing outside a bank
【单选题】what was mrs.franks ding doing when the accident took place?
A.
walking along churchill avence .
B.
getting ready to cross the road .
C.
standing outside a bank
【单选题】What was Mrs. Franks doing when the accident took place?
A.
Walking along Churchill Avenue.
B.
Getting ready to cross the road
C.
Standing out side a road.
【单选题】下列有关滴定的说法正确的是( )
A.
用25 mL滴定管进行中和滴定时,用去标准液的体积为21.7 mL
B.
用标准的KOH溶液滴定未知浓度的盐酸,配制标准溶液的固体KOH中有NaOH杂质,则结果偏低
C.
用c 1 mol·L - 1 酸性高锰酸钾溶液滴定V 2 mL未知浓度的H 2 C 2 O 4 溶液,至滴定终点用去酸性高锰酸钾溶液体积为V 1 mL,则H 2 C 2 O 4 溶液的浓度为 mol·L - 1
D.
用未知浓度的盐酸滴定已知浓度的NaOH溶液时,若读取读数时,滴定前仰视,滴定到终点后俯视,会导致测定结果偏低
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