题目内容
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提问人：网友hnhyjyjh
发布时间：2022-01-07
[主观题]
According to paragraph 3, what is unusual about the sun's corona？A．It is the outmost layer
According to paragraph 3, what is unusual about the sun's corona？
A．It is the outmost layer of the sun's atmosphere and is correspondingly cooler.
B．It is hotter than the photosphere despite being farther away from the core.
C．It is 200 times as deep as the photosphere and is most visible to the naked eye.
D．It is the layer of the sun's atmosphere where energy escapes as sunlight.
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,equivalent resistant torque on motor shaft
is following the diagram on below figure with circle of
.If driving torque
is constant and moment of inertia of each link can be ignored,find: (1) driving torque
， (3)calculate moment of inertia
of flywheel mounted on motor shaft if flunctuation coefficient
.
(9.) ____________ Overall, the number of UK commuters who travelled to work by bicycle rose considerably over the 10-year period. Inner London had by far the highest number of cycling commuters in both years. In 2001, well over 43 thousand residents of inner London commuted by bicycle, (10.) ____________, an increase of 144%. By contrast, although outer London had the second highest number of cycling commuters in each year, the percentage change, at only 45%, (11.) ___________. Brighton and Hove saw the second biggest increase (109%) in the number of residents cycling to work, but Bristol was the UK’s second city in terms of total numbers of cycling commuters, with 8,108 in 2001 and 15,768 in 2011. (12.) ___________. (13.) ___________. A. and this figure rose to more than 106 thousand in 2011 B. Other 8 cities, though not so high as the previous two cities, still demonstrate much changes, with the percentage ranging from 48%-94%. C. The table compares the numbers of people who cycled to work in twelve areas of the UK in the years 2001 and 2011. D. Here is the description of the chart on the paper. E. was the lowest of the twelve areas shown in the table F. This change of preference for bicycle as a means of transportation shows people’s awareness of environmental protection, which should be encouraged by the society. 现在请填写第9题答案。（填一个大写字母即可）
