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【单选题】
Which of the following costs would be classified asrevenueexpenditure.
A.
The cost of new plant
B.
Computer repairs costs
C.
The cost of installing the new plant
D.
The cost of adding extra storage capacity to a computer
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参考答案：
参考解析：
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举一反三
【单选题】Which of the following Chinese is the best translation for the English sentence: “Reading gives a person charm and elegance”?
A.
腹有诗书气自华。
B.
胸藏文墨虚若谷。
C.
书香传世家。
D.
书香盈袖自优雅。
【单选题】如图所示,一水平刚性轻杆,质量不计,杆长l=20 cm,其上穿有两个小球.初始时,两小球相对杆中心O对称放置,与O的距离d=5 cm,二者之间用细线拉紧.现在让细杆绕通过中心O的竖直固定轴作匀角速的转动,转速为 w 0 ,再烧断细线让两球向杆的两端滑动.不考虑转轴的和空气的摩擦,当两球都滑至杆端时,杆的角速度为
A.
2 w 0 .
B.
w 0 .
C.
w 0 .
D.
.