Cellulosic ethanol is a _____ produced from wood, grasses, or the inedible parts of plants.
举一反三
- Corn ethanol is produced by means of ethanol fermentation and _____.
- We can learn from the passage that the tired land has fully recovered ______. A: when grasses and other plants appear again B: when the treatment is given by nature alone C: after it has been lying idle for ten years D: after grasses and other plants have decayed again
- For what purpose did the young couple start the organization A: To make profits by selling seeds from rare plants. B: To set up a museum of plants passed down within families from Europe. C: To run a farm growing rare plants. D: To preserve seeds of rare plants.
- What plants do many insects tend to attack A: Quiet plants. B: Well-watered plants. C: Healthy plants. D: Thirsty plants.
- Which of the following call be inferred from the passage about cotton production in the United States after the introduction of Whitney's cotton gin（） A: More cotton came from sea island cotton plants than befor B: More cotton came from short-staple cotton plants than befor C: Most cotton produced was sold domesticall D: Most cotton produced was exported to Englan