A:have been driven; are trying to find
B:has been driven; is trying to find
C:are being driven; have found
D:have been driven; have tried to find
下列词语中,错别字最多的一组是( )
如图所示,是正在水中上浮的木块,请画出木块在水中所受重力G和浮力F浮的受力示意图。
下列区域的地形与河流流向说法错误的是( )