His father likes going hiking. _______.
A:So does his mother
B:So is his mother
C:So his mother is
D:So his mother does
两个互相垂直的力F1和F2同时作用在同一物体上,使物体由静止开始运动,物体通过一段位移的过程中,力F1对物体做功为8J,力F2对物体做功为6J,则F1和F2的合力对物体做功为( )
说说下列句子运用的修辞手法
初升的太阳射出金色的光芒。
已知某种植物杂交后所结果实中胚乳的基因型为AAaBBb、AAabbb、aaabbb、aaaBBb,那么母本和父本的基因型分别是( )
观察图中正方形四个顶点所标的数字规律,可知,数2016应标在( )