1.A feather is ________________(light) a stone.
举一反三
- The new fire symbolizes the light of the world from the tomb closed by a stone.
- Why do pumice stone float on the surface of the water? A: They are<br/>comparatively smaller. B: They contain special <br/>materials. C: They are not real stones. D: There are pores in the stone.
- 下面哪个表达不是陈词滥调？ A: go viral B: light as a feather C: happy as a lark D: gentle as a lamb
- These walls ___ stone.
- 1.A为n阶矩阵,且A^2-2A-E=0,求（A+3E)^-1