单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A) Playing the piano. C) Typing.
B) Making a photocopy. D) Taking a picture.
<上一题 目录 下一题>
热门 试题

单项选择题
According to the passage, how did the Bessemer method make the mass production of steel possible
A．It directed air at melted iron in a furnace, removing all impurities.
B．It slowly heated iron ore, then stirred it and heated it again.
C．It changed iron ore into iron, which was a substitute for’ steel.
D．It could quickly find deposits of iron ore under the ground.
单项选择题
A．producedB．managedC．farmedD．sold
A．produced
B．managed
C．farmed
D．sold
相关试题