中枢神经系统包括
A、脊神经CD
周围神经系统通常由三部分组成，包括脊神经、脑神经和植物性神经。中枢神经系统包括脊髓与脑。本题选CD。
The floor does not look so bad when ________ (sweep) clean.
I wonder if he could get it ________ (do) before tomorrow.
It's more ________ to buy a season ticket if you travel every day.
下列对关于个体手工业改造错误的是 ___________。
Wood does not conduct electricity; ________.
