Iron replaced stone and timber in the building of bridges because iron was considered ______.
A: more beautiful
B: new and modern
C: much stronger
D: easier to transport
A: more beautiful
B: new and modern
C: much stronger
D: easier to transport
举一反三
- In ancient time，there was no iron casting，so the needles were made of ______. A: stone B: tree C: iron D: mental
- 16. W______ bridges are not stronger than stone ones.
- If iron contains more than ____% C, the alloy is referred to a cast iron（） A: 2.11 B: 0.77 C: 4.3 D: 0
- The micro needle recorded in The Internal Medicine Canon of Huang Di, can only be made of ( ). A: cooper B: stone C: bian stone D: iron
- Jerry's new boat is much ________ than his old one. A: more beautiful B: beautiful C: beautifuller