在算式□12÷53中，要使商是两位数，□最小填____；要使商是一位数，□最大填____．
化学与生产、生活密切相关．下列叙述错误的是（ ）
Lily isn't as ________ as Peter. She often makes mistakes in her composition.
可得到氢气的质量为多少？可得到氧气的质量为多少？
