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【判断题】
同周期元素随着原子序数的增加,原子半径逐渐增大。A.
正确
B.
错误
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【单选题】当金属离子 M 和 N 共存时,欲以 EDTA 滴定其中的 M 。若 c M =10 c N , E t,ep =0.1% ,Δ pM=0.2 。则要求Δ lg K 的大小是
A.
4
B.
5
C.
6
D.
7
【简答题】“I Love My Neighborhood” Poster Contest The “I Love My Neighborhood” Poster Contest was developed in l993．It aims to educate your students and their families about neighborhood pride and duty．Lessons ...
【简答题】简述 PID 的可控参数及作用。
【简答题】Python采用【】格式标记一组语句,缩进量相同的是同一组语句。
【单选题】What are the two good points of Xiaoli’s poster?
A.
The title is obvious.
B.
The masks are appropriate for the party.
C.
Her poster includes all the main elements.
D.
Her poster is perfect.
【单选题】当金属离子 M 和 N 共存时,欲以 EDTA 滴定其中的 M ,若 C M =10C N , E t =0. 3 % , ΔpM ′ =0.2 则要求 Δlg K D ≥ ( )。
A.
5
B.
6
C.
4
D.
7
【多选题】What are the two good points of Xiaoli’s poster?
A.
The title is obvious.
B.
The masks are appropriate for the party.
C.
Her poster includes all the main elements.
【单选题】What’s the poster session?
A.
If the attendees are interested in your poster, they will buy the poster.
B.
A session with many posters which aim to promote the conference.
C.
The authors of the paper make a poster in the specified area.
D.
The authors show their contributions using a poster without oral presentation or discussion with others.
【简答题】当金属离子M和N共存时，欲以EDTA滴定其中同浓度的M，若c M =10c N ，终点误差E t =0.1%，△pM=0.2，则要求lgK' MY -lgK' NY =△lgK'的大小是多少?
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