The plant "sumpweed" is mentioned in line 25 in order to（）
A: contrast a plant with high nutritional value with one with little nutritional value
B: explain the medicinal use of a plant
C: clarify which plants grew better in places where trees were not cut down
D: provide an example of a plant that was easy to domesticate
A: contrast a plant with high nutritional value with one with little nutritional value
B: explain the medicinal use of a plant
C: clarify which plants grew better in places where trees were not cut down
D: provide an example of a plant that was easy to domesticate
举一反三
- —— What are they doing over there?——They ___trees on the hill. A: plants B: plant C: will plant D: are planting
- The book value of a plant asset is defined as:
- Do you often plant trees in spring?--Yes, many trees ___ in our school every year. A: plant B: are planting C: are planted D: will plant
- ______ is fun and a great way ______ greenhouse gases. A: Plant trees, reduce B: Planting trees, to reduce C: To plant trees, reduce D: Planting trees, to reducing
- Which one of the following relationships can describe the relationships in poppy, opium and morphine ( ) A: Plant - crude extract - purified compound B: Crude extract -plant - purified compound C: Purified compound -plant -crude extract D: Purified compound- crude extract -plant