道路运输从业人员应当遵守道路运输操作规程，不得违章作业，驾驶员连续驾驶时间不得超过（）小时。
A.1
B.2
C.3
D.4
参考答案：D
根据流体动力学平衡原理设计的缓控释制剂为（）
A.膜控释小丸
B.渗透泵片
C.磁性微球
D.胃滞留控释制剂
E.溶蚀性骨架片
．It’s not ____books you read but the way ____ you read them that decides how successfully you gain knowledge .
A．a number of ; in which
B．the number of ; /
C．a good many ; which
D．quite a few ; in which
