A:feel
B:are feeling
C:feels
D:was feeling
Nowadays,food safety has become the________of the government as well as the society.
图甲表示人体口腔上皮细胞临时装片制作部分步骤,图乙表示显微镜下观察到的视野.请回答:
下列图中能表示物体做匀减速直线运动的v﹣t图象的是( )