職稱英語(yǔ)考試?yán)砉ゎ?B級(jí))真題

1、職稱英語(yǔ)考試?yán)砉ゎ?B 級(jí) 真題及答案 3第 4 局部：閱讀理解 第 31 45題，每題 3分，共 45 分下面有 3 篇短文，每篇短文后有 5 道題。請(qǐng)根據(jù)短文內(nèi)容，為每題確定 1 個(gè) 選項(xiàng)。第一篇Sunspots來源:考試大網(wǎng)It s not surpris ing that sun spot太陽(yáng)黑子were observed by an cie nt astro no mers 天文學(xué)家 .The largest soupspoon the sun can be seen without a telescope.It was not until the invention of the

2、telescope 望遠(yuǎn)鏡 in the early 17th.century ，however， that systematic studies of sunspots could be undertaken.The great astronomer Galileo was among the first to make telescopic observations of sunspotsSun spots are regi ons of extremely strong magn etic fields磁場(chǎng)found on the sun S surface.A sunspot has

3、a dark central core known as the umbra.The umbra is surrounded by a dark ring called the penumbra，where the magnetic field spreads outward.Sunspots appear dark because they are giving off less radiation.They are cooler than the rest of the sun S surface Sunspots are frequently observed in- pairs of

4、in paired groups.The members of a.spot pair are identified as the leading spot and the following spot.They are identified by their position in the pair in terms of the directi on in Which the sun rotates旋轉(zhuǎn)The nu mber of sun spots at any one time varies.A large spot group may consist of as many as 10

5、 groups and 300 spots across the sun.The number of spots changes in a fairly regular pattern called the sunspot cycle.The largest number occurs about every 11 years.At sunspot minim Lm ，there are at most just a few small spots The average lifetime of an individual spot group is roughly one solar rot

6、ation ，which is about 25 days.The most persistent large slops ， however can survive for two to three months.31. Careful observations and systematic studies of sunspotsA. were made by ancient astronomers.B. started in the early 17thcentury.C. were made by Galileo only.D. could be made without a teles

7、cope.32. Sunspots are cooler than the rest of the sunA. they produce less energy.B. they are buried in the sun.C. they are far away from magnetic fields.D. they are close to magnetic fields.33 The leading spot and the following spot are the names ofA. two large sunspots.B. a large spot and a small spot.C. the two spots in a spot pair.D. the central core and the ring around it.34. Infiniteness sunspot activity had occurred in 1857, the next been inA. 1858.B. 1862.C. 1865考試大 ()D. 186835