指出下列物理现象中,哪些物体的运动状态发生了改变[ ]
A、停在站内的汽车
B、从站内开出的火车,速度在逐渐增大
C、行驶的汽车遇到紧急情况刹车停住
D、被起重机吊起的重物匀速上升
BC
When she heard the news, Julia was ______ angry to ______ a word.[ ]
A. so; speak
B. so; talk
C. too; tell
D. too; say
David’s a terrible dancer; he's too _____ and keeps stepping on his partner’s feet.
A.energetic
B.optional
C.sensitive
D.clumsy