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【简答题】
一阶电路如图7.73所示,t<0电路已稳定。t=0时合上开关S,试求t≥0+时的电流iL(t)和i(t),并定性绘出它们随时间变化的曲线。
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参考答案:
举一反三
【单选题】铣床的工作精度检验项目有矩形工件铣削后的三个面相互间的()要求。
A.
对称度
B.
垂直度
C.
倾斜度
D.
平行度
【单选题】生活中常见的塑料袋和橡胶制品的主要材料均属于( )
A.
合金
B.
硅酸盐
C.
高分子材料
D.
无机物
【单选题】静脉注射去甲肾上腺素时
A.
B.
C.
D.
【单选题】可使尿量增多的因素是()
A.
静脉注射抗利尿激素
B.
刺激减压神经
C.
静脉注射去甲肾上腺素
D.
静脉注射高渗葡萄糖
E.
静脉注射抗生素
【多选题】实验流行病学方法包括()
A.
临床实验
B.
病例报告
C.
现患研究
D.
病例对照研究
E.
现场干预研究
【简答题】Alice was a pretty girl. She liked nothing except dressing 1 and dancing. Of course she wasn’t good at her 2 . But the boys were willing to help her with her lessons 3 they liked to dance with her. Af...
【单选题】Chemical reactions in our brains change with what we think.
A.
Y
B.
N
C.
NG
【简答题】A son, a job and housekeeping forcedromance out. But there had been too much publicityabout my case. The complexity of the human situationand the injustice of the social order demand far more fundamen...
【简答题】Half a year before graduation from college, my son began to seek a job. the financial cr, fewer companies would like to new staff. My son targeted a company that was to hire only one person there ...
【单选题】Professor Shimamura identified a number of areas in which mental function may change.
A.
Y
B.
N
C.
NG
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