题目内容：
Which of the following are the advantages of lithium ion batteries（）
A.portable
B.the best energy densities
C.significant memory effect
D.a slow loss of charge when not in use
参考答案：【答案仅供学习，请勿对照自行用药等】
选择题：Which of the following are the advantages of lithium ion bat
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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