单项选择题

According to the author, the steel wires used to make barbed wire are specially processed to （）

A．make them more flexible
B．protect them against rust
C．straighten them
D．prevent contraction in cold weather

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热门试题

单项选择题

What is the benefit of using two stranded barbed wire（）

A．Easier installation.
B．Improved rust-resistance.
C．Increased strength.
D．More rapid attachment of barbs.

单项选择题

What is the main topic of the passage（）

A．A new type of fencing is introduced.
B．Cattle ranching and farming in the United States.
C．Barbed wire is better than singlestranded wire.
D．How the wires were made in industry.