已知x=1y=-1是方程2x﹣ay=3的一组解,那么a的值为( )
阅读理解
Name: Kelsey
Age: 22
I can sing and dance. I can play the violin and the piano, but I can't play the guitar.
Name: Paul
Age: 13
I can sing, but I can't dance. I can play the trumpet and the guitar but I can't play the violin.
“少年安能长少年,海波尚变为桑田”;“死生有命,富贵在天”;“望梅止渴,心灵手巧”;“因地制宣、因势利导、因材施教”上述的观点各体现了( )
当你出现紧张、生气、烦恼,甚至感到焦虑、抑郁时,下列方式你不能采取的是( )