植物降解
参考答案：
植物本身及其相关微生物和各种酶系将有机污染物降解为小分子的CO2和H2O，或转化为无毒性的中间产物。
石墨和金刚石都是碳的单质，石墨在一定条件下可转化为金刚石．已知把石墨完全转化为金刚石时，要吸收能量，下列说法正确的是（ ）
A．石墨不如金刚石稳定
B．金刚石不如石墨稳定
C．等质量的金刚石与石墨完全燃烧，放出的能量一样多
D．等质量的金刚石与石墨完全燃烧，石墨放出的能量少
A client is being admitted to the labor unit. Because she’s well advanced in labor, the nurse must prioritize the admission questions. Which information is most important to obtain when birth is imminent（）
A. Duration of previous labor.
B. Frequency of contractions.
C. Presence of bloody show.
D. Expected due date.
