如何避免阿司匹林诱发的胃溃疡和胃出血
A．饭后服用
B．将药片嚼碎
C．同服碳酸氢钠
D．服用肠溶片
E．与酸奶同服
参考答案：A,D,E
We had over 120,000 people here at______weekend and expect to have up to_____-third of that number on the beach today.
A．the; a
B．the; the
C．不填；a
D．a; the
局部放电测量仪中的校准脉冲发生器的内阻应不大于（）。
A.50Ω
B.100Ω
C.150Ω
D.200Ω
