题目

 —Which of the two T-shirts will you take? —I’ll take        . One is for my brother and the other is for myself. A. either   B. both     C. neither     D. all 答案：B下列物质的俗称与化学式相符的是 A．熟石灰CaO      B．小苏打 Na2CO3    C．纯碱 NaHCO3       D．烧碱NaOH