题目内容

望局部包括（）

A. 望畸形
B. 望形态
C. 望肿胀、瘀斑
D. 望创口
E. 望肢体功能

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A lost or stolen credit card isn’t just causing trouble. It has the potential to cause plenty of damage, especially if you have a high credit limit or a lot of available credit. So it’s crucial that you know what to do when your credit card has been lost or stolen. Your first priority is to prevent a thief from using it. Call your credit card issuer as soon as you notice your card is missing.

产生顺反异构的条件有

A. 有双键的存在
B. 双键上的碳原子连有两个相同的原子或原子团
C. 双键上的碳原子分别连有两个不同的原子或原子团
D. A+C

下列有机物分子中，可形成顺反异构的是

A. CH2=CHCH3
B. CH2=CHCH2CH3
CH3CH=C(CH3)2
D. CH3CH=CHCl

下列烯烃中存在顺反异构体的是

A. 丙烯
B. 1-丁烯
C. 1-戊烯
D. 2-戊烯