A:impolite
B:convenient
C:expensive
D:uncrowded
“Do you love me?” she asked. He h____ and then said, “I am not sure.”
如图一是人体消化管示意图,图二是部分消化腺结构图,请据图回答下列问题:
一个圆柱形容器的底面半径是4分米,高是6分米,里面盛满水,倒进棱长是8分米的正方体容器内,水深是多少分米?
下列过程中属于弹性势能转化为动能的是( )