1．一个粗细均匀的长直管子，两端开口，里面有4个白球和4个黑球，球的直径、两端开口的直径等于管子的内径，现在白球和黑球的排列是reatest achievement in the past 4-5 years?

    2.  term career objectives? ost ideal job for you?

    3. why do you want to join ibm? what do you think you can contribute to ibm?</p>

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