中国大学MOOC: Many a student ___ sent to plant trees.
中国大学MOOC: Many a student ___ sent to plant trees.
中国大学MOOC: 28. Many a student ___ sent to plant trees.
中国大学MOOC: 28. Many a student ___ sent to plant trees.
Many a student_____________plant trees. A: has been sent to B: have been sent to
Many a student_____________plant trees. A: has been sent to B: have been sent to
高等植物(higher plant)和低等植物(lower plant)
高等植物(higher plant)和低等植物(lower plant)
种子植物(seed plant)和孢子植物(spore plant)
种子植物(seed plant)和孢子植物(spore plant)
Plant 是指一个受控机械系统，可定义为Plant
Plant 是指一个受控机械系统，可定义为Plant
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
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
水电站 _________________ plant
水电站 _________________ plant
—— What are they doing over there?——They ___trees on the hill. A: plants B: plant C: will plant D: are planting
—— What are they doing over there?——They ___trees on the hill. A: plants B: plant C: will plant D: are planting
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
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