在“探究光的反射规律”的实验中,如图所示,平面镜M放在水平桌面上,E、F是两块粘接起来的硬纸板,垂直于镜面且可绕ON转动.
I couldn't do it _________ your great help. Thanks a lot!
下列各句中,加横线词语使用正确的一项是( )
In order to stay healthy, people pay more attention to their _______.