【单选题】认识生命,才能尊重生命,下列对生命的认识正确的是( )
C.
死亡是人生不可避免的归宿,我们应顺其自然发展。
【判断题】轮毂上键槽的深度尺寸,查阅标准后,按d+t1来标注,如尺寸为31.3,不可取整,应按31.3标注。
【单选题】There is now clear ______ that these chemicals are damaging the environment of this area.
【简答题】影响氧化还原反应速率的因素有 、 、 、 。
【简答题】There is now clear evidence that the pollution caused by the______________use of cars has produced serious health effects.