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用H2RA维持治疗过程中，复发的溃疡半数以上是
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听力原文：M: British English and American English are really about the same, aren't they？
W: I don't think so. It seems that some of the spellings are different.
M: You're right, Nina. Words like "theater" and "center" end in "r-e" in England instead of in" e-r" like we spell them. Can you think of any more exampies？
W: The word "color" ？
M: Good. Actually, many words which end in "o-r" in American English are spelled "o-u-r" in British English.
W:OK. There are some differences in pronunciation and meaning.
M: Anyway, we both agree that British English and American English are different. Right？
W: Sure. But not so different that it prevents us from understanding each other.
M: Yes. I quite agree with you.
What do both of the speakers agree on？
第二节
听下面5段对话或独白。每段对话或独白后有几道小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有5秒钟的时间阅读各个小题；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。
听力原文：W: Would it be possible to see you today？
M: Yes, My office hours are 10:30 to noon.
W: I've been having trouble with the homework.
M: Come by anytime. We'll talk about it.
What time will the woman most probably see the man？
听力原文：W: Jack said he can give us a ride to the game.
M: Oh, good, then he does have his car.
What does Jack have？
患者，女，30岁。8个多月来月经量增多，1周来皮肤瘀斑伴牙龈出血，不挑食，无光过敏和口腔溃疡。查体：脾侧位肋下刚触及。化验血Hb 85g/L，RBC 4.0×1012/L，WBC 5.1×109/L，PLT 25×109/L，尿常规(-)。骨髓检查：粒红比例正常，全片见巨核细胞138个，其中产板型4个。
最可能的诊断是
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