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【单选题】
单选题-关于I型反应皮肤试验，描述错误的是A.
—般在15～20分钟观察结果
B.
局部皮肤有丘疹,周围有红晕
C.
组织改变为局部水肿、充血
D.
可检测引起I型反应的变应原
E.
可有单个核细胞浸润
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反馈参考答案：
举一反三
【单选题】The 10-cm radar as compared to a 3-cm radar of similar specifications will_____
A.
be more suitable for river and harbor navigation
B.
provide better range performance on low lying targets during good weather and clam seas
C.
have a wider horizontal beam width
D.
have more sea return during rough sea conditions
【简答题】“不忘初心,牢记使命”主题教育的总要求是
【单选题】The 3-cm radar as compared to a 10-cm radar with similar specifications will ______.
A.
give better range performance in rain，hail，etc
B.
display small targets in a mass of dense sea clutter at a greater range
C.
have less sea return in choppy rough seas
D.
display a more maplike presentation for inshore navigation
【简答题】表面粗糙度对零件配合性质的影响有哪些？
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