圆柱形的汽油贮藏罐的高度约为12.5米,底面圆的半径为8米。
(1)求这个贮藏罐的容积;(π取3.14)
(2)如果每0.001立方米的汽油重0.8kg,求此贮藏罐贮满汽油的时候,里面贮藏汽油的重量。(精确到万kg)
解:(1)(米2);
(2)(kg)。
圆柱形的汽油贮藏罐的高度约为12.5米,底面圆的半径为8米。
(1)求这个贮藏罐的容积;(π取3.14)
(2)如果每0.001立方米的汽油重0.8kg,求此贮藏罐贮满汽油的时候,里面贮藏汽油的重量。(精确到万kg)
解:(1)(米2);
(2)(kg)。
Passage Four
Which of the following is NOT a reason that many motorway accidents are categorized under headings other than sleepiness
A.The Transport and Road Research Laboratory finds the cause as "perceptual errors".
B.Drivers are unwilling to admit to "falling asleep" for fear of being dismissed.
C.Few investigators inquire further to discover the actual reasons hidden behind.
D.Insurance companies are reluctant to pay insurance for drivers’ sleepiness.