(下列各题共用备选答案) A．通络止痛 B．镇惊安神 C．降逆 D．清热平肝 E．清热解毒 牡蛎除平肝潜阳外，还可

已知PbSO4（M=303．26g.mol-1）在水中的溶解度是0．048g.L-1，它的Ksp=（）。 点击查看答案

Which of the following is stated to be true?A．A revisit to the place where you have learned something contributes to memory.B．Failing to understand a film indicates the beginning of the loss of memory.C．Top chess players tend to have better memories than the rest of us.D．People who are good at remembering images are poor at remembering names. 点击查看答案