多动症儿童行为有哪些特征？（）
A.活动过多
B.注意力不集中
C.冲动行为
D.交往困难
参考答案：A, B, C
将十进制小数0.875转换为二进制小数是
A．0.111
B．1.11
C．0.110
D．0.1
According to the passage, what is the major interest of the officials of Glacier National Park
A．To limit land development around the park.
B．To establish a new park in Montana.
C．To influence national legislation.
D．To settle border disputes with Canada.
