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【单选题】
Translate the following sentence into English. “有些支出,如广告支出和职工培训费用,很难客观地估计其受益期间。”A.
For some expenditure, such as those for advertising or employee training programs, it is not possible to estimate objectively the number of accounting period over which revenue is likely to be produced.
B.
Such as those for advertising or employee training programs, it is not possible to estimate objectively the number of accounting period over which revenue is likely to be produced.
C.
For some expenditure, such as those for advertising or employ training programs, it is not possible to estimate objectively the number of accounting period over which revenue is likely to be produced.
D.
None of the above.
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【简答题】物体在地面附近绕地球做匀速圆周运动的速度，叫做第一宇宙速度，它的计算公式为 （千米/秒），其实g=0.0098千米/秒²，R=6370千米，求第一宇宙速度（结果保留2个有效数字。
【简答题】MP3-10-02.mp3:
【单选题】命题p： a-1 a ＞0；命题q：y=a x 是R上的增函数，则p是q成立的（ ）
A.
必要不充分条件
B.
充分不必要条件
C.
充分且必要条件
D.
既不充分也不必要条件