胃癌的癌前病变有：慢性萎缩性胃炎、胃息肉、残胃炎、恶性贫血胃体有显著萎缩者；少数胃溃疡。
参考答案：对
下列哪个药物最容易引起喉痉挛（）。
A.异丙酚
B.依托咪酯
C.咪达唑仑
D.硫喷妥钠
E.地西泮
I am afraid something terrible has _____. I won't be able to see you tonight. [ ]
A. set down
B. gone through
C. come up
D. got along
