请输入或粘贴题目内容
搜题
拍照、语音搜题，请扫码下载APP
题目内容
（请给出正确答案）
A．It directed air at melted iron in a furnace, removing all impurities.
B．It could quickly find deposits of iron ore under the ground.
C．It slowly heated iron ore, then stirred it and heated it again.
D．It changed iron ore into iron, which was a substitute for steel.
答案
更多“A．It directed air at melted iron in a furnace, removing all impurities.B．It could quic”相关的问题
第1题
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.
第2题
How is the quartz heater different from other types of heaters？
A．It heats only the objects in a room.
B．It is lighter in weight.
C．It heats the room quicker.
D．It is more common.
第3题
What is wrong about The Lost World？
A．It was directed by Steven Speilberg.
B．It is a balance of story and technical things.
C．It is the sequel to Jurassic Park.
D．It simply relies on action to keep the drama going.
第4题
Which of the following is NOT true of the robot built by Srinivasan？
A．It was directed by signals converted from the electrical activity in Belle's brain
B．It converted the electrical patterns into instructions for the other robot.
C．It was six hundred miles away from where Belle was.
D．It could perform. the same function as Belle did.
第5题
Which of the following is NOT true of the robot built by Srinivasan？
A．It was directed by signals converted from the electrical activity in Belle's brain
B．It converted the electrical patterns into instructions for the other robot.
C．It was six hundred miles away from where Belle was.
D．It could perform. the same function as Belle did.
第6题
The computer is important to the air line because ______.
A．it sells tickets
B．it writes out tickets
C．it gives the information needed
D．it knows when a plane takes off.
第7题
A．It has different color.
B．It has air inside.
C．Sediment gets stirred up and mixes with water.
D．It's not mentioned in the conversation.
第8题
From the passage we know that ______.
A．it was Galileo that formed the hypothesis of air pressure
B．Torricelli was confused by the problem of the water-pump
C．Pascal's experiment further proved the air-pressure hypothesis
D．the weight of mercury column influenced air pressure
第9题
In the e-mail, what is indicated about the air conditioning system？
A．It will be replaced for free.
B．It was repaired a few times.
C．It is the newest design available.
D．It was not repaired promptly.
第10题
A.It contributes less to air pollution than truck industry.
B.Its competitors are inconsiderate of customers.
C.It preserves a traditional way of doing business.
D.It creates personal fortunes for investors.
