I can’t remember when exactly the Robinsons left _____ city. I only remember it was ______ Sunday.

A．the; a

B．a; the

C．a; a

D．the; the

下列关于泥炭的特征描述错误的是( )

A．含水量极高
B．透水性很低
C．压缩性很高且均匀
D．承载能力很低