As I write this, I'm sitting on a bus back to Santiago in Chile where I am currently working____a language assistant. I've just spent the weekend in a city called La Serena north of Santiago. I was lucky enough to see the flowering desert, a natural phenomenon that ____(occur) around every five years here in the Atacama Desert.

    ____(follow) a particularly large amount of rainfall earlier, a____(vary) of flowers come into blossom. Bright purple flowers create ____ unbelievably beautiful scene at the base of the surrounding mountains.

    ____(catch) a glimpse of this magnificent treasure of nature, we took a bus from La Serena to a nearby town and then rented a car to go to the desert.____ we saw did not disappoint us, and as expected it was even more fascinating than the pictures we had seen online. The bloom was particularly ____(impress) this year due to the strong presence of El Niño (a band of warm water in the Pacific Ocean that changes the temperatures and increases the rainfall in certain areas). The vast carpet of colour ____ spread into the distance towards the contrasting green hills was ____(simple) breathtaking and deserved a large amount of photos! A real reminder of the beauty our planet can provide.

POS刷卡机的广泛应用给人们的生活带来了便利。POS机的刷卡位置有一个绕有线圈的小铁环制成的检测头（如图所示），在使用时，将带有磁条的信用卡在POS机指定位置刷一下，检测头的线圈中就会产生变化的电流，POS机便可读出磁条上的信息。下列图中能反映POS刷卡机读出信息原理的是（　　）