题目

It is difficult for doctors to help a person with a damaged brain. Without enough blood, the brain lives for only three to five minutes. More often the doctors can’t fix the damage. Sometimes they are afraid to try something to help because it is dangerous to work on the brain. The doctors might make the person worse if he operates on the brain. Dr Robert White, a famous professor and doctor, thinks he knows a way to help. He thinks doctors should make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes. This gives the doctor a longer time to do somethin人们发现氧化铁硫杆菌能促使黄铁矿(FeS2)氧化成硫酸铁和硫酸，氧化铁硫杆菌能把矿物中的硫或硫化物氧化成硫酸，而硫酸和硫酸铁能将某些矿石中的金属元素转化成金属硫酸盐，从而开辟了“细菌冶金”的先河。氧化铁硫杆菌的活动过程如图所示，其中a过程发生的反应为4FeS2+15O2+2H2O2Fe2(SO4)3+2H2SO4。则下列说法错误的是A.a过程中释放能量B.细菌在反应a过程中起了催化剂的作用C.b过程类似于植物的光合作用，细菌将能量储存在C6H12O6中D.有些细菌可直接把含铅、汞等重金属的矿石溶解，得到重金属离子的溶液