Emily from Cochrane Crowd here. First of all, it's great that you're checking out Cochrane Crowd! Welcome.
And they are great questions.
Yes, you are right that the studies have to be about humans.
In terms of quasi-randomised studies, sometimes in studies the form of randomisation used is not truly random. For example, treatment may have been allocated by date of birth or day of the week. These are what we think of as CCTs but you could also call them quasi-randomised controlled trials.
I'd recommend checking out the 'Quick reference' and 'FAQs' which you can access through your Cochrane Crowd dashboard, they are handy as a Cochrane Crowd newcomer.
Please feel free to keep the questions and feedback a-coming, we welcome it all! The best way to get hold of us is to tweet us @cochrane_crowd or email through to firstname.lastname@example.org AND email@example.com. Anna and I work in opposite timezones so when the questions are time critical it's best to email both of us!
Thanks again for connecting in with Cochrane Crowd and hope to see you at our CitSciMed Blitz challenge, which starts at 3pm GMT on Friday the 2nd.