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【单选题】
在气-液色谱分析中, 样品组分与固定相间的相互作用主要表现为下述哪种过程A.
空间排阻
B.
吸附-脱附
C.
溶解-挥发
D.
离子交换
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】汽车数字式示波器( )。 A、波形轨迹为即时状态 B、显示比模拟式示波器快 C、图像不可以保存记录 D、图像比较稳定,不会闪烁
A.
选择1
B.
选择2
C.
选择3
D.
选择4
【单选题】What happens at the age of two and a half?
A.
Some children become a lot more emotional.
B.
Parents change the way they discipline their children.
C.
Some children become very aware of their environment.
D.
Some children remain empathic while others don't.
【简答题】混合式学习设计的焦点是学生和 ，而不是技术。
【单选题】What are the two speakers doing?
A.
Playing a ball game.
B.
Cheering for Oxford.
C.
Watching a football match.
【单选题】what is the possible relationship between the two speakers?
A.
Teacher and student
B.
Doctor and patient
C.
Manager and office worker
D.
Policeman and driver
【简答题】Technology will continue to advance and change, and you must _________ learn.
【单选题】If you want to advance yourself in your studies, you will first have to ________ yourself of those shortcomings that can become barriers to progress.
A.
remove
B.
react
C.
rid
D.
reduce
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