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【单选题】
关于肠梗阻，下列哪错误的A.
绞窄性肠梗阻比单纯性肠梗阻发病突然而且严重
B.
单纯性及绞窄性肠梗阻均有痉挛性疼痛，前者为间歇性，后者为持续性且辗转不安
C.
单纯肠梗阻时，有反射性呕吐，而绞窄性时几乎不发生
D.
单纯性肠梗阻在开始疼痛时的间歇期一般无压痛，而绞窄性肠梗阻则压痛明显
E.
单纯性肠梗阻的肠蠕动明显，而绞窄性易发生麻痹
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举一反三
【单选题】已知Head(Tail)[Head(s)，Head(Tail(Tail(S)))]))=[a]，广义表S满足上式，则S为( )。
A.
[a,b]b,a]
B.
[[b,a],[a][b]]
C.
[[a],[a,b][b]]
D.
[[b],[b,a],[a]]
【单选题】①红细胞破坏过多是指红细胞寿命缩短引起的溶血性贫血，有先天遗传性的溶血性贫血，也有后天获得性的溶血性贫血 ②失血包括急性失血和慢性失血 ③其发病机制可以概括为红细胞生成不足或减少、红细胞破坏过多和失血三类 ④当然，贫血也可以是多因素叠加的结果 ⑤贫血是继发于多种疾病的一种临床表现 ⑥红细胞生成不足或减少包括大家熟悉的再生障碍性贫血，造血原料如铁、叶酸、维生素B缺乏引起的营养性贫血，肿瘤细胞浸润骨髓...
A.
⑥③①②⑤④
B.
⑤③⑥①②④
C.
⑥①②⑤③④
D.
⑤③①②⑥④
【简答题】People usually don't like mice. one mouse has been one of the most famous film stars in the world. That is the well-known Mickey Mouse. One night a man Walt Disney was drawing when he heard a strange ...
【简答题】广义表A((( ),(a,(b),c))),head(tail(head(tail(head(A))))等于 。
【单选题】Which of the following is TRUE about the effect of learner factors on pronunciation?
A.
Learners whose native language has similar sounds to English are more likely to have problems with pronunciation.
B.
Learners who have more exposure to English need more focus on pronunciation.
C.
Adult learners need more focus on pronunciation.
D.
Young learners need more focus on pronunciation.
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