已知长方形ABCD在平面直角坐标系的位置如图,将长方形ABCD沿x轴向左平移,使C点和坐标原点重合,再沿y轴向下平移,使D点与坐标原点重合,此时B点的坐标是( )。
(-5,-3)
Last summer holidays, he went to the countryside and worked together with farmers.In this way
he learnt________from farmers .[ ]
A. a great many
B. a great deal
C. scores of
D. much more
脊柱易发生肥厚和钙化,并引起相应临床症状的韧带有()。
A.棘上韧带
B.棘间韧带
C.前纵韧带
D.后纵韧带
E.黄韧带