题目

 According to a recent survey of many bookstores, books on popular science are ______.  A. in demand               B. in need            C. in charge                       D. in control    答案：A因血糖造成的惊厥和昏迷的直接原因是 [　　] A．胰岛素分泌过多B．脑细胞供能不足 C．骨骼肌供能不足D．胰高血糖素分泌不足