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【单选题】
下列有关电泳溶液的离子强度的描述中,错误的是( )A.
溶液的离子强度对带电粒子的泳动有影响
B.
离子强度越高,泳动速度越快
C.
离子强度太低,缓冲液的电流下降
D.
离子强度太低,扩散现象严重,是分辨率明显降低
E.
离子强度太高,严重使琼脂板断裂而导致电泳中断
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举一反三
【单选题】Reading newspapers______.
A.
is a custom just among men who can read
B.
is a daily activity most British people enjoy
C.
is something the British do only when traveling on a train
D.
can help people in many ways
【单选题】( )是指网络营销活动实施以后,通过对营销活动过程的分析、评价及效果反馈,以检验营销活动是否取得了预期效果的行为。
A.
网络营销效果分析
B.
网络营销效果评价
C.
网络营销效果分析的评价体系
D.
网站推广评估
【简答题】Reading newspapers has become an important part of everyday life. Some people read newspapers as the first thing to do in the morning; others read newspapers as soon as they have free time during the ...
【单选题】Reading newspapers is a good way to _________ current events.
A.
keep away from
B.
take notice of
C.
keep track of
D.
make notes of
【简答题】Reading is an activity people enjoy a lot in their free time. Some like reading newspapers, and others enjoy novels or comic books. I like reading about the lives of great poeple. This always gives me...
【单选题】Not far from the river is a house,____owner seated in it reading newspapers.
A.
its
B.
whose
C.
which
D.
where
【单选题】不哭、不动,黄疸加重,查体发现脐部周围红肿,有渗液,该患儿被诊断为败血症,常见的感染途径是( )
A.
脐部感染
B.
呼吸道感染
C.
羊水穿刺
D.
胎膜早破
E.
宫内感染
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