【单选题】Many young researchers are finding solutions to problems that may __________. 查看材料
A.
a nearly 40-degree angle
E.
a super-strong battery
F.
benefit their community
【简答题】把四个边长为3厘米的正方形拼成一个大正方形。这个大正方形的周长是多少厘米?
【简答题】Many researchers believe, like crying does for small children, swearing helps ______.
【单选题】把2个边长是3厘米的正方形拼成一个长方形,这个长方形的周长是( )
【单选题】Some researchers believe that many patterns of nature are rules of their own and not affected by natural selection.
【单选题】How many researchers does the passage mention? 查看材料
【单选题】把边长 3厘米的3个正方形拼成一个长方形,它的周长是( )。
【简答题】把3个边长2厘米的正方形拼成一个长方形,这个长方形的长是______厘米,周长是______厘米.