The husband and wife have strange habits. He'd like to sleep with lamp _______ at night and his wife likes to sleep with the window _______.
关于宋代的衣食住行中的"食"的说法不正确的是( )
用化学用语表示：
（1）磷元素 ____ （2）3个铁离子 ____（3）水银 ____ （4）乙醇 ____
一元二次方程x2﹣2x=0的解是（ ）
