——Would you like to come to my house for dinner tonight?——I'd love to , _____ I have lots of work to do .
A:so
B:or
C:and
D:but
一艘远洋轮船装上货物后,发现船下沉了一些,则它受到的浮力____ (选填“变大”、“变小”或“不变”).当船由内河驶入大海后,船受到浮力____ (选填“变大”、“变小”或“不变”),船相对于水面将____ (选填“上浮”、“下沉”或“不变”).
对于函数y=﹣3x,下列结论正确的是( )