Question

16．

A．positioned    B．resolution   C．suspected    D．lightweight    E．challenge F．generated    G．journal    H．eventually    I．accurate    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 （欧洲秃鹰） 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 （空气动力学上最佳的）-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．文章以研究秃鹰为例，说明鸟类在一起飞翔的时候以"V字形"的原因是为了节省能量．

解答 41．D  考查形容词．根据常识和后面的The humans rode in a paraplane，a type of lightweight aircraft，and the birds followed．可知，应该是给秃鹰装了一个"轻便的"传感器．
42．C  考查动词．根据后面的but never proved可知，该解释是一直被"猜想"而未被证明的，故选C项．
43．G  考查名词．根据前面的report和后面斜体的NatureNature可知，这里是指一杂志名，故选G项，journal．
44．A  考查动词．根据 in spots that were aerodynamically optimal可知，这里指秃鹰给自己定"位置"．
45．F  考查动词（非谓语动词）．根据常识，swirls of upward-moving air是由the wings of the bird ahead"生成、触发"的．
46．E  考查名词．根据上下文的句意可知，这里是指面对的主要"挑战"是数据的搜集，故选E项．
47．J  考查动词．由后面的as可知，要选raised，表示"作为"保护项目的一部分．
48．K  考查副词．修饰形容词endangered要用副词形式，根据句意，这里表示"极度濒危，严重濒临灭绝的物种"，故用critically endangered species．
49．I  考查形容词．由后面的about one foot and refreshes five times per second可知，是给出了一个"确切的"数字，故用accurate来修饰．
50．B  考查名词． 根据句意，这里是指必要的"分辨率"来track the birds'positions in relation to one another．

点评 本文属于11选10阅读题型．在做选词填空题时，很重要的一点就是要确认空格处所要填的词的词性，然后根据句子的法则，也是就是句法来判断所要填的词．