题目

句型转换【1】There aren't any books on the desk.（改为同义句）There __________ __________books on the desk.【2】Can I help you?（改为同义句）__________ can I do __________ you?【3】Both of them like wearing trainers.（对划线部分提问）________ __________ both of them like wearing?【4】My mother buys a kilo of meat from the market.（改成复数形式）My mother buys two __________of __________from the market.【5】He often chats with his parents in the sitting room.（用now改写句子）He __________ __________ with his parents in the sitting room now.函数f(x)=ln(2+x-x2)|x|-x的定义域为（　　）A．（-1，2）B．（-1，0）∪（0，2）C．（-1，0）D．（0，2）