题型:选择题 Pandas like eating and elephants like eating .A.leafs, grassesB.leaves, grassC.leaf, grassD.leaves, grasses 查看答案
题型:填空题 若一个石块重5N,把石块挂在弹簧测力计下端,将其浸没在某种液体中,此时弹簧测力计的示数为4N,则该石块受到液体的浮力为______N.由此可知,此石块排开的液体重______N. 查看答案