下列哪些做法能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.同服碳酸钠
D.服用肠溶片
E.同服酸奶
参考答案:A, B, C, D
It is widely believed that smoking______ lung cancer?[ ]
A. contributes to
B. turns to
C. objects to
D. points to
请绘制煤样制备流程图