—Yes, it ________nice.
A:hears
B:sounds
C:looks
D:listens
如图,在平面直角坐标系中,四边形ABCO是正方形,已知点C的坐标为(3,1),则点B的坐标为( )
如图,杠杆处于平衡状态,O为支点,A为动力作用点,B为阻力作用点.请在图中画出阻力F2的力臂l2,以及作用在A点的最小动力F1的示意图.
A:Our new school is big and nice. There is a gym in our school now.
B:Yes, and there is a big library, too.