液压（）元件是把通过式回路输入的液压能转变成机械能输出的装置。
参考答案：执行
—Would you like to come to dinner tonight?
— , but I’ve got a lot of things to do.
A．Sorry, I wouldn’t
B．Yes, I’d like
C．No, I wouldn’t
D．Yes, I’d love to
用手将一重为5N的物体全部压入水中，物体排开的水重为6N，此时物体受到的浮力为______N；放手后物体将______（选填“上浮”“下沉”或“悬浮”）；待物体静止时它排开水的体积是______m3．（g=10N/kg）
