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【简答题】
当电磁波由一种媒质(如空气)入射到良导体时,因电磁波在良导体中衰减很快,折射波进入良导体后很快就衰减掉了,电磁波只存在导体的表面,这个现象称为 。
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举一反三
【简答题】Which one would she like?
【单选题】—We have two seats free here. Which one would you like? — ! My mother is coming to see the film with me.
A.
None
B.
Neither
C.
All
D.
Both
【单选题】男性，32岁。上腹部疼痛3年，疼痛发作与饮食、情绪变化有关。上腹部有广泛轻压痛。胃镜检查：主要表现为胃窦黏膜可透见黏膜下血管，皱襞平坦。诊断应是
A.
消化性溃疡
B.
胃黏膜脱垂症
C.
慢性萎缩性胃炎
D.
胃癌
E.
慢性浅表性胃炎
【判断题】英译汉: Carbon steel( 碳钢 ) Martensite( 马氏体 ) Pearlite( 珠光体 ) Cementite( 渗碳体 ) Ferrite( 铁素体 ) Austenite( 奥氏体 ) annealing( 退火 ), normalizing( 正火 ), quenching( 淬火 ), and tempering( 回火 )
A.
正确
B.
错误
【简答题】Supercooled austenite may transform into a pearlite-type structure in the temperature range of.
【单选题】Which one would be the best title of this text?
A.
L. A.'s Traffic Problem
B.
Subway—Replacement of Car
C.
L. A. 's Traffic—the Worst in the U. S.
D.
L. A. 's Traffic Jam and Structural Problems
【单选题】听力原文：W: I'm interested in buying one of these machines. Err, which one would you recommend? M: Oh, this one here, madam. It has three different programs and can take up to three kilos. Q: What is the ...
A.
A television.
B.
A washing machine.
C.
A computer.
D.
A fridge.
【多选题】王先生皮肤创伤后出现了化脓性感染,于伤口部位使用红霉素软膏治疗,每日换药,三天后不见好转,判断可能有细菌耐药,取伤口浓汁做微生物分离检查,应使用的培养基类型应是( )
A.
鉴别培养基
B.
选择培养基
C.
液体培养基
D.
固体培养基
E.
半固体培养基
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【简答题】Supercooled austenite may transform into a pearlite-type structure in the temperature range of.
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