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【单选题】
对于离子交换柱色谱法,下列说法错误的是A.
离子交换树脂是一类具有网状结构的高分子化合物
B.
离子交换柱色谱法的分离原理属于离子交换原理
C.
离子交换树脂有阴离子交换树脂和阳离子交换树脂两种
D.
某组份的离子性越强,被交换的能力越弱,越容易被洗脱下来
E.
离子交换树脂的性能主要有交联度和交换容量两个指标
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【单选题】He was arrested last night and has been ( ) smuggling.
A.
charged with
B.
charging with
C.
charged of
D.
charging of
【单选题】Before he was arrested, he had taken _______ one-month holiday, and stayed in the country with ________ 18-year-old girl, one of his students.
A.
a, a
B.
an, an
C.
a, an
D.
an, a
【单选题】He was arrested on charges of corruption and of power.
A.
abuse
B.
absorption
C.
cruelty
D.
malfunction
【单选题】He was arrested on charges of corruption and _____ of power .
A.
use
B.
attribute
C.
abuse
D.
appointment
【简答题】He was arrested on charges of corruption and ________ of power.
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