羧甲基纤维素钠的英文缩写
A．口含片B．舌下片C．多层片D．肠溶衣片E．控释片 `
参考答案：B
Mother us stories when we were young. [ ]
A. was used to tell
B. is used to tell
C. used to tell
D. used to telling
在MCS-51单片机内部结构中，TMOD为模式控制寄存器，主要用来控制定时器的启动与停止。（）
