1、工程力学的研究内容有:和2、静力学的研究对象是:;材料力学的研究对象是。
Formanypeople,thebestwaytoget______downtownisjusttowalk.
A. in
B. on
C. about
D. around
EverydayIgotoschool______bike.
A. ride
B. by
C. on
D. in
It'smuchmore______totakeataxithantotakeabus.
A. cheap
B. cheaper
C. expensive
D. cost