Shanghai lies _______ the east of China and _______ the northeast of Guangdong.
A:in; to
B:in; in
C:to; to
D:to; in
猜谜语。
一只球,热烘烘,出在西,落在东。
——____
(60×25)×____=60×(____×8)
下列实例中,不能利用气体或液体压强与流速关系解释的是( )