A.It should be made of metal.B.It should be durable, distinct, divisible and portable.C.It had been 2,000 years old.D.It should be made of high-quality materials.
A.It should be made of metal.
B.It should be durable, distinct, divisible and portable.
C.It had been 2,000 years old.
D.It should be made of high-quality materials.