世界海陆比例大约( )
A:5:4
B:6:4
C:7:3
D:8:2
如图所示,电源电压为6V,闭合开关后,电压表的示数为4V,下列描述不正确的是( )
Mr. Brown is so strict ______ us that everyone in Grade 8 is scared _____ him.
Lee is new in Yangzhou. Maybe he needs a _____for sightseeing.