He placed one of the arrows __ his bow.
A.in
B.on
C.at
D.against
答案:A
in his bow意思是:在他的弓上.
Your shoes ______ easily but they ______ well.[ ]
A. wear; haven't worn
B. are worn; haven't worn
C. wear; haven't been worn
D. are worn; haven't been worn
摩擦式锚杆是通过钢管与孔壁之间的摩擦作用达到锚固的目的,多为()。