问题 选择题

下图表示利用GIS信息技术绘制耕地农作物NDVI(归一化植被指数。正值,表示有植被覆盖,且随覆盖度增大而增大)曲线,通过描述一年23个时相表现的植被覆盖度变化反映作物从播种、出苗、抽穗到成熟收割时NDVI 的变化过程。据此回答各题。

小题1:以上四图为某省耕地植被覆盖度变化的四种类型,则该省可能位于

A.辽宁省

B.宁夏回族自治区

C.河北省

D.浙江省小题2:图中农业复种指数最高的可能为

A.a图

B.b图

C.c图

D.d图

答案

小题1:D

小题2:C

根据题意,NDVI曲线波峰即植被茂盛成熟期。a有一个波峰,为一年一熟;b有两个波峰,为一年两熟;c有三个波峰,为一年三熟;由纵坐标数值可以看出,d的植被指数较低,为裸地。

小题1:四省中以浙江省的水热条件最优,D选项正确。

小题2:农业复种指数指一年内农作物总播种面积与耕地面积之比,与熟制呈正相关。c地一年三熟,故农业复种指数最高。

点评:本题以地理信息技术的应用为背景,考查读图分析能力,具有较高的借鉴意义。

单项选择题

Eddie McKay, a once forgotten pilot, is a subject of great interest to a group of history students in Canada.
It all started when Graham Broad, a professor at the University of Western Ontario, found McKay’s name in a footnote in a book about university history. Mckay, was included in a list of university alumni who had served during the First World War, but his name was unfamiliar to Broad, a specialist in military history. Out of curiosity, Broad spent hours at the local archives in a fruitless search for information on McKay. Tired and discouraged, he finally gave up. On his way out, Broad’s glance happened to fall on an exhibiting case showing some old newspapers. His eye was drawn to an old picture of a young man in a rugby uniform. As he read the words beside the picture, he experienced a thrilling realization. "After looking for him all day, there he was, staring up at me out of the exhibiting case," said Broad. Excited by the find, Broad asked his students to continue his search. They combed old newspapers and other materials for clues. Gradually, a picture came into view.
Captain Alfred Edwin McKay joined the British Royal Flying Corps in 1916. He downed ten enemy planes, outlived his entire squadron as a WW1 flyer, spent some time as a flying instructor in England, then returned to the front, where he was eventually shot down over Belgium and killed in December 1917. But there’s more to his story. "For a brief time in 1916 he was probably the most famous pilot in the world," says Broad. "He was credited with downing Oswald Boelcke, the most famous German pilot at the time." Yet, in a letter home, McKay refused to take credit, saying that Boelcke had actually crashed into another German plane.
McKay’s war records were destroyed during World War Two air bombing on London-an explanation for why he was all but forgotten.
But now, thanks to the efforts of Broad and his students, a marker in McKay’s memory was placed on the university grounds in November 2007. "I found my eyes filling with tears as I read the word ’deceased’ next to his name," said Corey Everrett, a student who found a picture of Mckay in his uniform. "This was such a simple example of the fact that he had been a student just like us, but instead of finishing his time at Western, he chose to fight and die for his country.\

What did the students find out about McKay

A. He trained pilots for some time.
B. He lived longer than other pilots.
C. He died in World War Two.
D. He was downed by the pilot Boelcke.

单项选择题