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【单选题】
我国高速铁路牵引供电系统的电源电压等级是( )KV。A.
110
B.
220
C.
330
D.
35
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反馈参考答案：
举一反三
【简答题】计算机系统总线经历了怎样的一个发展历程?
【简答题】5 What idea did Smith learn from his military experience? How did he relate the idea to his business later?
【简答题】病历分析 [病历摘要]男性，3岁，发热、呕吐、腹泻2天。患儿2天前开始发热39℃，然后开始吐泻，每日呕吐2～3次，呕吐为非喷射性，吐出物为胃内容物，大便10余次／日，为黄色稀水便，蛋花汤样，无黏液及脓血，无特殊臭味，偶有轻咳。发病后食欲差，今日8小时以来无尿。急性病容，精神萎靡，烦躁，全身皮肤无黄染，未见皮疹，皮肤弹性差，眼窝明显凹陷。心率138次／分，律齐，心音低钝，肺（-），腹稍胀，肝肋下1c...
【简答题】病历摘要患儿，男性，4岁，腹泻、发热2天，伴惊厥1天，急诊来院。 2天前（9月14日），开始间断性腹痛不适，伴腹泻，每日10余次，每次量不多，为黏液样便，继而发热。今日体温骤然升高，反复发生惊厥3次，惊止后昏睡，精神差，伴剧烈呕吐2次。既往史：身体健康，无特殊疾病史。查体：T 40℃，P 132次／分，R24次／分，BP 110/90mmHg，精神委靡，呈昏睡状，无明显失水征，营养状况好，四肢尚暖...
【单选题】-Has Sam finished his homework today, Anne? -I have no idea. But he ________ it this morning. [ ]
A.
did
B.
had done
C.
was doing
D.
had done
【单选题】When did Jack begin to try out his idea?
A.
As soon as he got his taxi license.
B.
When he arrived in the city
C.
When he was a clean-up man for the taxi company
D.
After he made friends with the author
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