——I'm going to the party on foot.
——If you do, you'll be ___________. The party will start soon.
A:late
B:lucky
C:nervous
D:injured
小明在完成“动手动脑学物理”时,认识了密度计.将其放入液体中,当它竖立静止时,密度计的读数即为待测液体的密度.