1. What is the difference (注意不是different,这里要用名词形式)/similarity AMONG these 3 pictures? 2. What is the difference/ similarity BETWEEN these 2 pictures? 3. What is the difference/ similarity AMONY Beijing, Shanghai and Guangzhou? 4. What is the difference/ similarity AMONY New York, Chicago, Washington and Los Angeles?
如果你想表达问有"哪些"不同点时就用:What are the differences/ similarities....
What's the difference among these three pictures? What's the same among these three pictures? What's the difference /the same between the two pictures? What's the difference /the same among Beijing ,Shanghai ,Guangzhou ? What's the difference /the same among New York ,Chicago ,Washington ,Losangeles?