题目

阅读短文,下列问题Hi, I'm Tina. This is a photo of Class 18. This class has twenty-five students, twelve girls and thirteen boys. These are Amy and Bob. Amy is Bob's sister. Amy is 12 and Bob is 13. Amy likes English and math. Bob likes music. He has a CD collection. This is Bruce. He is 14. He likes sports and he has a sports collection. Jerry is a teacher. He is thirty-four years old. He likes blue, black and green. Many of his clothes are in these colors. Do you know the relationship between Jerry and Bruce? Aha! Jerry is Bruce's uncle. And you can call him at 0543-3617625. （下列实验能达到相应实验目的的是选项实验内容实验目的A在5mL 0.005mol/L FeCl3和5mL 0.1mol/L KSCN的混合溶液中，加入饱和FeCl3溶液，溶液的红色加深验证浓度对化学平衡的影响B室温下，用pH试纸测定浓度为0.1mol·L-1 NaClO溶液和0.1mol·L-1 CH3COONa溶液的pH比较HClO和CH3COOH的酸性强弱C常温下，测得浓度均为0.1mol/L溶液的pH：NaA＞NaB证明常温下的Ka：HA＜HBD等体积、pH均为2的HA和HB两种酸分别与足量Zn反应，HA放出的H2多证明HA是强酸A. A B. B C. C D. D