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【简答题】
设点P是曲线y=x 2 上的一个动点，曲线y=x 2 在点P处的切线为l，过点P且与直线l垂直的直线与曲线y=x 2 的另一交点为Q，则PQ的最小值为______．
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【简答题】A desert is a very dry land where there is hardly any rain. In the day, it can be so hot that you could fry an egg on the ground. But during the night it is sometimes so could that water would turn in...
【简答题】阅读理解。 A desert is a very dry land where there is hardly any rain. In the day, it can be so hot that you could fry an egg on the ground. But during the night it is sometimes so could that water would t...
【单选题】患者,女性,45岁,下班后感到心慌而就诊。护士为其数脉搏时,发现每隔两个正常的搏动后出现一次过早的搏动。该护士判断此脉搏是
A.
三联律
B.
间歇脉
C.
二联律
D.
脉律异常
E.
脉搏短绌
【判断题】当desert表示dry land with little or no vegetation时,重音在the first syllable;当desert表示to leave empty or alone时,重音在the second syllable.
A.
正确
B.
错误
【简答题】The accounting rules for long-term investments in equity securities depend on the percentage of __ by the investor.
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