题目

实验证明，维生素B1在140℃时还不至于被分解破坏。有人做馒头时爱加过量的碱，长此以往，容易患脚气病。这是因为（ ）A．高温会破坏维生素B1B．碱能破坏维生素B1C．面粉中缺乏维生素B1D．患者吸收不到足够的维生素B1 答案：B解析:略— I played basketball for a whole morning yesterday and felt pretty good.— You will be healthier if you exercise more ________. [    ]A. regularly  B. extremelyC. fluently  D. annually