听力原文:M: Look! Who is behind the tree?
W: It's Li Ming. He is reading there.
Q: What's Li Ming doing?
(21)
A.He is reading.
B.He is playing.
C.He is singing.
第1题
胃、十二指肠溃疡瘢痕性幽门梗阻引起的呕吐特点是
A.呕吐物以胃酸为主,不含胆汁
B.呕吐物以胃酸为主,含胆汁
C.呕吐物以宿食为主,不含胆汁
D.呕吐物以宿食为主,含胆汁
E.呕吐后腹部症状改善不明显,胃部仍不适
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