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【简答题】
(Ⅰ)求经过点(1,-7)与圆 相切的切线方程. (Ⅱ)直线 经过点P(5,5)且和圆C: 相交,截得弦长为 ,求 的方程.
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举一反三
【单选题】A: There's Dr. Jones on a motorcycle! Do you believe it? B: Yeah, he ( ) several.
A.
owns
B.
is owning
【单选题】关于电磁现象描述错误的选项是( )
A.
继电器工作过程利用电流的磁效应。
B.
前照灯开启后灯泡发热是因为电流的热效应。
C.
发电机的转子线圈切割定子线圈的磁力线而产生感应电动势。
D.
电动机转子线圈放在磁场中,因受到电磁转矩的作用而旋转。
【多选题】锅炉发生汽水共沸时,应对锅炉进行换水,以降低锅炉水的()
A.
pH值
B.
碱度
C.
含盐量
D.
硬度
E.
以上答案都不对
【判断题】Dr. Dorian didn’t believe that the web itself is a miracle.
A.
正确
B.
错误
【判断题】车上货物责任险条款责任限额由投保人和保险人在投保时协商确定。
A.
正确
B.
错误
【单选题】听力原文:W: Guess what? Al! Dr. Watts found a part-time job for me! I can't believe it! I'll be working alongside a professor from Harvard! M: Wow, that's so cool, Lily! It's so great that your environmen...
A.
Because she wants to practice herself.
B.
Because she wants to work with the professor from Harvard.
C.
Because she has to support the family.
D.
Because she is tired of the classes.
【单选题】The patients believe that Dr. Smith knows exactly how to put them _________.
A.
right
B.
correct
C.
well
D.
straight
【单选题】听力原文:W: Guess what? Al! Dr. Watts found a part time job for me! I can't believe it! I'll be working alongside a professor from Harvard ! M: Wow, that's so cool, Lily! It's so great that your environme...
A.
Because she wants to practice herself.
B.
Bemuse she wants to work with the professor from Harvard.
C.
Because she has to support the family.
D.
Because she is tired of the classes.
【单选题】某孕妇,G1P0,孕32周,感头晕,乏力及食欲差,半月余,查:胎位、胎心及骨盆均正常,血红蛋白80g/L,红细胞压积25%。对于该孕妇,可能的诊断是
A.
巨幼红细胞性贫血
B.
缺铁性贫血
C.
地中海贫血
D.
再生障碍性贫血
E.
以上都不是
【简答题】Why do people believe what Dr.Zhong says and admire him?
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