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问题 选择题

下列有机物命名正确的是[ ]

A． 2-乙基丙烷

B．CH3CH2CH2CH2OH   1-丁醇

C． 间二甲苯

D． 2一甲基-2-丙烯

答案

答案：B

选择题
I _____ busy with my homework, otherwise I _____ to the cinema with you.

A. had been; would have gone
B. had been; had gone
C. was; would go
D. was; would have gone
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单项选择题

骨骺分离属于

A．骨折
B．关节脱位
C．先天性骨发育不良
D．骨髓炎的一种类型
E．骨肿瘤
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