单项选择题
下列化合物的1H NMR谱,各组峰全是单峰的是()
A. CH3-OOC-CH2CH3
B. (CH3)2CH-O-CH(CH3)2
C. CH3-OOC-CH2-COO-CH3
D. CH3CH2-OOC-CH2CH2-COO-CH2CH3
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单项选择题
A. CH3-OOC-CH2CH3
B. (CH3)2CH-O-CH(CH3)2
C. CH3-OOC-CH2-COO-CH3
D. CH3CH2-OOC-CH2CH2-COO-CH2CH3
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