Question

16．

A．positioned    B．resolution   C．suspected    D．lightweight    E．challenge F．generated    G．journal    H．eventually    I．a(chǎn)ccurate    J．raised    K．critically

The Power of V
Birds of a feather may flock together，but why they fly together in V formations has never been known for certain．
Now，with the help of 14 northern bald ibises （歐洲禿鷹） equipped with（41）Dsensors on a 600-mile migration from Austria to Italy，researchers are suggesting that the explanation is one that was long （42）Cbut never proved：the formations helps the birds conserve energy．
Reporting in the （43）GNature，the scientists write that the ibises（44）Athemselves in spots that were aerodynamically optimal （空氣動力學上最佳的）-allowing them to take advantage of swirls of upward-moving air（45）Fby the wings of the bird ahead．Since the lead bird got no lift advantage，the ibises regularly switched leaders．
"We've been wondering for years whether flapping birds can save energy by following each other in the right way，"said Geiffrey Spedding，a researcher at the University of Southern California，who was not involved in the study．"This word answers that question，and the answer is yes．"
The scientists，led by Jim Usherwood of the Royal Veterinary College in England，said a major （46）Ewas obtaining the data．The ibises hatched at Zoo Vienna in March 2011 and （47）Jas part of a conservation project aimed at reintroducing the （48）Kendangered species to its natural range in Europe．
Some of the study's authors served as human foster parents，taking the young birds on training flights in Salzburg，Austria．The humans rode in a paraplane，a type of lightweight aircraft，and the birds followed．Eventually，the foster parents taught the birds their 600-mile migration route from Salzburg to Orbetello，Italy，by flying alongside them．
The birds wore custom-made data loggers that allowed the researchers to track flapping，speed and direction．Weighing less than an ounce，the devices included a memory card and a GPS unit，among other things．It is（49）Ito about one foot and refreshes five times per second-the（50）Bnecessary to track the birds'positions in relation to one another．
The new study does not say how much energy the ibises saved through the V formation，but small gains could be useful over long migrations，experts say．

Answer 1

分析 本文是一篇科技文．文章以研究禿鷹為例，說明鳥類在一起飛翔的時候以"V字形"的原因是為了節(jié)省能量．

解答 41．D  考查形容詞．根據(jù)常識和后面的The humans rode in a paraplane，a type of lightweight aircraft，and the birds followed．可知，應(yīng)該是給禿鷹裝了一個"輕便的"傳感器．
42．C  考查動詞．根據(jù)后面的but never proved可知，該解釋是一直被"猜想"而未被證明的，故選C項．
43．G  考查名詞．根據(jù)前面的report和后面斜體的NatureNature可知，這里是指一雜志名，故選G項，journal．
44．A  考查動詞．根據(jù) in spots that were aerodynamically optimal可知，這里指禿鷹給自己定"位置"．
45．F  考查動詞（非謂語動詞）．根據(jù)常識，swirls of upward-moving air是由the wings of the bird ahead"生成、觸發(fā)"的．
46．E  考查名詞．根據(jù)上下文的句意可知，這里是指面對的主要"挑戰(zhàn)"是數(shù)據(jù)的搜集，故選E項．
47．J  考查動詞．由后面的as可知，要選raised，表示"作為"保護項目的一部分．
48．K  考查副詞．修飾形容詞endangered要用副詞形式，根據(jù)句意，這里表示"極度瀕危，嚴重瀕臨滅絕的物種"，故用critically endangered species．
49．I  考查形容詞．由后面的about one foot and refreshes five times per second可知，是給出了一個"確切的"數(shù)字，故用accurate來修飾．
50．B  考查名詞． 根據(jù)句意，這里是指必要的"分辨率"來track the birds'positions in relation to one another．

點評 本文屬于11選10閱讀題型．在做選詞填空題時，很重要的一點就是要確認空格處所要填的詞的詞性，然后根據(jù)句子的法則，也是就是句法來判斷所要填的詞．