生物的多样性不包括( )
A:遗传的多样性
B:生态环境的多样性
C:生态系统的多样性
D:物种的多样性
邓小平同志是我国实行改革开放和社会主义现代化建设的总设计师,因为( )
①他解决了什么是社会主义的问题 ②他经历了战争与和平年代 ③他解决了怎样建设社会主义的基本问题 ④他具有卓越的才能
- Our head teacher is responsible for his work. He spends most of his time with us.
- ________ He always communicates with our parents in his free time.