Does she go to school ___ foot or ____ bike?

A．on ….by

B．with…with a

C．on a …with the

D．with…on the

鲫鱼心脏的构成情况是（）.

A.一心房一心室

B.两心房一心室

C.两心房两心室

D.两心房和不完全分隔心室