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【单选题】
(47969) 在铺设无缝线路中,将长轨条始终端落槽就位时的平均轨温称为()。又称零应力状态的轨温。
A.
铺设轨温
B.
设计轨温
C.
施工锁定轨温
D.
中和轨温
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【简答题】一动圆和直线 l:x=- 1 2 相切,并且经过点 F( 1 2 ,0) , (Ⅰ)求动圆的圆心θ的轨迹C的方程; (Ⅱ)若过点P(2,0)且斜率为k的直线交曲线C于M(x 1 ,y 1 ),N(x 2 ,y 2 )两点. 求证:OM⊥ON.
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【判断题】“明月几时有,把酒问青天” 的诗句显示出了作者李白的豪迈情怀。
A.
正确
B.
错误
【判断题】“明月几时有,把酒问青天” 的诗句显示出了作者李白的豪迈情怀。
A.
正确
B.
错误
【单选题】直销银行特色不包括( )? ( )
A.
有门店
B.
去实体化
C.
费用低廉
D.
运营成本低
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A.
镜面舌
B.
地图舌
C.
草莓舌
D.
牛肉舌
E.
黑毛舌
【单选题】Scott thought of himself as a very successful marketer. He created a campaign with a product logo that was very popular and that customers associated with a quality product. It was so popular that in ...
A.
Too much repetition was decreasing the strength of the CS, thus leading to extinction of the learned relationship between the logo, the quality of the product, and the association with Scott's company.
B.
Customers confused Scott's logo with the logo of Scott's competitors, making cognitive learning incomplete.
C.
The logo produced only a fixed-ratio schedule of reinforcement that did not sustain sales, while Scott's competitor used a variable-ratio schedule.
D.
Over time the logo became boring, and customers punished Scott's company by buying competitors' products as a type of revenge for their boredom.
【简答题】(普通班)已知椭圆 ( a > b >0)的焦距为4,且与椭圆 有相同的离心率,斜率为 k 的直线 l 经过点 M (0,1),与椭圆 C 交于不同两点 A 、 B . (1)求椭圆 C 的标准方程; (2)当椭圆 C 的右焦点 F 在以 AB 为直径的圆内时,求 k 的取值范围. (实验班)已知函数 R). (Ⅰ)若 ,求曲线 在点 处的的切线方程; (Ⅱ)若 对任意 恒成立,求实数 的取值范围...
【单选题】护理学四个基本概念的核心是
A.
环境与人的关系
B.
护理
C.
D.
健康
E.
环境
【简答题】Thesales began to ()()last month
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