Let's throw the bottle the sea.
-When is Women's Day? -It's _ March 8.
10.34-8.42=( )
你知道古代人民吃的食物是如何演变的?
“六一”前夕,某质监部门对儿童玩具市场进行了专项检查,发现个别种类玩具的材质易断裂,断裂后尖锐的边缘因受力面积____ ,对人体的压强____ ,容易刺伤孩子.