Professor Thring's mechanical coal miner ______.
A: has already been seen by the Coal Board
B: is his first invention
C: looks like a TV camera
D: is not yet in production
A: has already been seen by the Coal Board
B: is his first invention
C: looks like a TV camera
D: is not yet in production
D
举一反三
- What particular advantage does Professor Thring's coal miner have A: It does not have to go deep underground. B: It can work in very narrow spaces. C: It can work in the open air. D: It is twice as strong as a human miner.
- In recent years ( ) has seen the largest increase of any country in coal consumption.
- The invention of this new machinery will _________________ the coal industry.
- ___certain that his invention will lead to the development of production A: That is B: This is C: It is D: It has
- Coal is most used for the electricity production in()and().
内容
- 0
Coal has been ______ by natural gas as a major source of energy. A: displaced B: deposited C: displeased D: disposed
- 1
The most easily oxidized coal is (). A: lignite coal B: bituminous coal C: lean coal D: anthracite coal
- 2
The ability of coal to release a combustible gas has long been known. A: submit B: emit C: admit D: permit
- 3
People are aware that coal, which has gone to mass production, is still a finite resource, though _________ than either oil or gas.
- 4
Has he been ______ of his father's death yet A: said B: declared C: mentioned D: informed