A:4
B:5
C:6
D:7
把10cm长的线段进行黄金分割,则较长线段的长(5≈2.236,精确到0.01)是( )
下列括号内的成语使用不当的一项是()
They are _______ little sheep that we can't make much money by selling _______.
下列对禽流感病毒的叙述中,错误的是( )