A wiki might be considered an unreliable source because many users collaborate modifying the content and structure directly. This would mean that anyone can contribute and they might write false information, or opinions. If you need to expand vocabulary or research for information it is better to consult books or articles written and corrected by professionals. <span />
C. when you discuss the difficult concepts it will get you thinking more about what happened in the book and what you think about the book. you will also remember better based on your opinions or your peers opinions about the book or subject
These are all true exact for these last one; forming acidic oxides is not a property of metals
the s stand for subject and v stand up for verb and o is object
2. o stand for object ,v stand up for verb and o is object
