题目内容
在内外环境因素作用下，细胞具有产生膜电位变化的能力或特性，称为：
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Main idea of part II
The text tells us that Margie, a girl who is aged 11 in 2157, always _______ school because her teacher is a _______ one and she has to learn at regular hours and put her ______________________ into a slotin the ___________. It also tells us how _______ she is ___ the children who studied together, experienced ___________, and had _________ teachers about two hundred years earlier.
文件型病毒传染的对象主要是()类文件.
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