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【单选题】
当一个化合物中含有一个溴元素时,可以观察到它的质谱图中同位素离子峰,其中 M:(M+2) 是A.
1:1
B.
3:1
C.
2:1
D.
1:2
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反馈参考答案：
举一反三
【单选题】My in teaching is different from yours.
A.
attitude
B.
appear C. approach D. approval
【单选题】My approach is not to learn everything about something, but______something about everything.
A.
rather to learn
B.
to learn rather
C.
to rather learn
D.
rather learning
【单选题】My approach is not to learn everything about something, but______something about everything.
A.
rather to learn
B.
rather learning
C.
to rather learn
D.
rather than learn
【简答题】My turn was _____ ( approach) .
【简答题】下列不属于会计核算基本前提的是（ ）。
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