A:等边三角形
B:等腰三角形
C:直角三角形
D:等腰直角三角形
—I think he _______ if it doesn't rain.
⑴Lily is on the phone. ____ A.
⑵Jim can carry this bag.____ B.
⑶Be careful!The water is very hot.____ C.
⑷The apples are falling! ____ D.
⑸The plane is flying away.____ E.
下列四个图象分别描述甲、乙,丙、丁四个物体的位移、速度、加速度和所受的合外力与时间的关系.关于四个物体的运动.下列说法正确的是( )