A:①②⑤③④
B:③②⑤④①
C:④⑤③②①
D:②③⑤①④
下列常用词语中书写完全正确的一项是( )
–Which hair band do you like best, madam?–I can't decide now. I really don't know _________.
下列实验设计合理的是( )