What are Peter going to do?
____改为____
— Did you listen to Li Yundi _____ the piano yesterday evening?
— Yes. He played _____ and all the audience clapped loudly at the end.
1844年,米切尔先生曾将各种质料的中国土布样品寄到英国去,并且注明其价格。有人告诉米切尔先生,按照他所列的价格,他们在曼彻斯特不能生产那种布匹,更不能把它运往中国。这说明( )
已知函数f(x)=5x,g(x)=ax2﹣x,若f(g(1))=1,则a=( )