A:a worse one
B:a nicer one
C:such a worse one
D:such a nicer one
There is a pay phone ____ the bank.
A图中新植物体的幼体是胚,它是由____(填数字序号)构成的;
世界上最大的沙漠是 ( )
若代数式x-2在实数范围内有意义,则x的取值范围是( )