刚收获的种子晾晒干失去的是什么水,烘烤干种子失去的又是什么水?
刚收获的种子晾干失去的是自由水,自由水易丢失;烘烤干种子失去的是结合水,一旦种子失去结合水,意味着种子已经死亡。
Tony often helps his parents _____ the garden after school.[ ]
A. watches
B. clean
C. tidying
D. to see
According to the passage, why do people join groups that practice secondary cooperation
A.To share the happiness with others.
B.To get rewards for themselves.
C.To associate with people who have similar backgrounds.
D.To defeat a common enemy.