北京大學(xué)2010年考博英語真題2

希賽網(wǎng)英語頻道為大家整理北京大學(xué)2010年考博英語真題。

Part Three Cloze Test (10%)

Directions: Read the following passage carefully and choose ONE best word for each numbered blank. Mark your answers on the ANSWER SHEET.

The strangest weather of last year was possibly not on Earth, but on the Sun. Every 11 years 31 the Sun goes through a cycle of sunspots ——actually magnetic storms erupting across its surface. The number of sunspots 32 its minimum in 2007 and 33 have increased soon afterwards, but the Sun has remained strangely quiet since then. Scientists have been baffled as weeks and sometimes months have gone by without a single sunspot, in 34 is thought to be the deepest solar minimum for almost 100 years.

This 35 of solar activity means that cosmic rays reaching Earth from space have increased and the planet’s ionosphere in the upper atmosphere has sunk in 36 ，giving less drag on satellites and making collisions between them and space junk more likely. The solar minimum could also be cooling the climate on Earth because of slightly diminished solar irradiance. In fact, the quiet spell on the Sun may be 37 some of the wanning effects of greenhouse gases, accounts for the somewhat flat temperature trend of the past decade. But 38 if this solar minimum is offsetting global warming, scientists stress that the overall effect is relatively slight and certainly will not last. The Sun has gone into long quiet spells before. From 1645 to 1715 few sunspots were seen during a period called the Little Ice Age，when short summers and savage winters often plagued Northern Europe. Scotland was hit particularly 39 as harvests were ruined in cold, miserable summers, which led to famine, death, migration and huge depopulation. But whether the quiet Sun was entirely to blame for it remains highly 40 ?

31. A. and so B. or so C. on so D. so on

32. A. increased B. got C. reduced D. reached

33. A. should B. could C. would D. might

34. A. which B. that C. what D. how

35. A. much B. lack C. number D. amount

36. A. high B. height C. altitude D. space

37. A. making B. causing C. decreasing D. masking

38. A. even B. what C. in case D. still

39. A. hard B. severe C. harsh D. heavy

40. A. certain B. unlikely C. likely D. uncertain

考博英語自學(xué)神器：北京大學(xué)-希賽學(xué)習(xí)包

版權(quán)輔導(dǎo)教材+推薦自學(xué)計(jì)劃+在線智能題庫+知識(shí)點(diǎn)練習(xí)+入群共同學(xué)習(xí)+1-2年服務(wù)期

考博英語培訓(xùn)課程：北京大學(xué)-希賽課程

結(jié)合歷年考試真題，輔以相關(guān)理論知識(shí)，以輕松、簡(jiǎn)化的語言教授，讓學(xué)生迅速掌握知識(shí)點(diǎn)及做題技巧。

點(diǎn)擊返回北京大學(xué)考博英語真題匯總

點(diǎn)擊查看全國(guó)醫(yī)學(xué)博士英語統(tǒng)一考試真題匯總

點(diǎn)擊查看醫(yī)學(xué)考博英語真題核心詞匯合集匯總

點(diǎn)擊查看歷年中科院考博英語真題總卷

>>點(diǎn)擊注冊(cè)會(huì)員，享更多英語考試相關(guān)資料

素材來源：網(wǎng)絡(luò)