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【简答题】
设直线l 1 与曲线 相切P，直线l 2 过点P 且垂直于l 1 ，若l 2 交x轴于Q点，又作PK垂直于x轴K，求KQ的长。
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反馈参考答案：
举一反三
【简答题】C/S的全称是( ),B/S的全称是( )。(写英文简写)
【单选题】We will keep you ______ for any change in price or delivery. ( )
A.
inform
B.
to inform
C.
informing
D.
Informed
【单选题】_________ our order of June 17 we will keep you well advised of the relative development:
A.
With reference to
B.
Regards to
C.
Regards on
D.
With reference on
【简答题】Ladies and Gentlemen: This is purser 1 . Due to the mechanical problem we will 2 for take-off. Our maintenance 3 are troubleshooting. Please remain 4 and we will keep you 5 any update. During this per...
【简答题】C/S 的全称是 (用英文描述) B/S 的全称是 (用英文描述)
【单选题】_____ our order of June 17, we will keep you well informed of the relative development.
A.
With reference to
B.
Regards to
C.
Regards on
D.
With reference on
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