生态建设和环境保护的主要政策包括( )。
A.产业政策
B.建立健全生态补偿机制
C.技术政策
D.税收政策
E.经济支援政策
参考答案:A,B,C,E
There are many trees ___ of the road! And ____ of the trees is growing larger and larger.[ ]
A. on both side; a number
B. on each sides; a number
C. on both sides; the number
D. on every side; the number
原子序数为29的元素,其原子核外电子排布应为()。
A.
B.
C.
D.