I don't know________. Can you tell me, please?
A:how the two players are old
B:how old are the two players
C:the two players are how old
D:how old the two players are
下列生活现象中发生化学变化的是( )
有下列仪器,在实验中使用仪器的说法错误的是
关于欧洲西部畜牧业的说法,正确的是( )
①视而不见,不管闲事
②设法提醒被偷的乘客
③和同学一起将该青年痛打一顿
④及时拨打“110”电话报警