What is Professor Thring's invention
A: A kind of machine which miners ride on.
B: A machine to supply fresh air to tunnels.
C: A digging machine operated at a distance.
D: A form of metal protective clothing.
A: A kind of machine which miners ride on.
B: A machine to supply fresh air to tunnels.
C: A digging machine operated at a distance.
D: A form of metal protective clothing.
举一反三
- The invention of sewing machine<br/>was vital in mass-production of clothing. A: T B: F C: NM
- They position the metal stock on the machine tool—___________，___________，___________, or other type of machine A: drill press B: lathe C: milling machine D: turning machine
- The factory has produced a new kind of ____. A: machine B: machines C: a machine D: the machine
- Their factory has developed a kind of ___ to help people walk. A: machine B: machines C: a machine D: the machine
- Their factory has developed a kind of ______to help people walk. A: [A] the machine B: machines C: machine