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【简答题】
是指当一个车轮轮缘紧贴钢轨时,另一个车轮轮缘与钢轨之间的____。它对列车运行时的平稳性和轨道的____性有重要的影响。太小,会增加行车____,增大钢轨及车轮的磨损,危及行车安全。过大,车辆行驶时蛇形运动的幅度越大,横向加速度越大,轮缘对钢轨的冲击角越大,作用于钢轨上的____也越大。
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举一反三
【简答题】黄某,女,34岁,因多年未孕进行治疗,被怀疑患有甲状腺功能亢进,需进行I131试验,在准备期间,下列食物可以进食的是
【单选题】黄某,女,34岁,因多年未孕进行治疗,被怀疑患有甲状腺功能亢进,需进行I131试验,在准备期间,下列食物可以进食的是
A.
海带
B.
加碘食盐
C.
紫菜
D.
卷心菜
E.
鱼虾类
【简答题】a college student,I should take part in some instructive activities.
【单选题】一个急性上消化道大出血的病人,经抢救5小时后,下列哪项能判断上消化道出血已好转:
A.
血压、脉搏输血后恢复正常又恶化
B.
红细胞计数、血红蛋白继续下降
C.
由鲜红血便变成黑便
D.
血尿素氮持续升高
E.
中心静脉压不稳定
【简答题】Dear Victor: I am a college student. Nowadays s on the net are very popular with college students. Some of my roommates are very interested in them. They not only play s in their free time, bu...
【简答题】Dear Victor, I am a college student. Nowadays s on the net are very popular with college students. Some of my roommates are very interested in them. They not only play s in their free time, bu...
【简答题】SECTION A COMPOSITION (35 MIN) After graduation, every college student will have to find a job. Some of them choose the job that they are interest in; others choose to work for money. What's your idea...
【简答题】Of course, the best way to see what a true day in the life of a college student is like is to actually get the schedules of some college students!
【简答题】What are some benefits for a college student to do a part-time job? Please name at least 2 of the benefits according to the interview in this unit.
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