题目

将手机置于封闭的玻璃罩内，把罩内抽成真空，再拨打该手机号码，则（     ） A．能听到手机响铃，并看到屏幕上显示有来电 B．如果手机开振动模式，则能看到手机振动并发出声音 C．手机信号是通过电磁波传播的 D．将手机音量调大一些就能听到响铃 答案：C阅读理解 　　In the 19th century Americans from the eastern states moved out west to settle in the rich new lands along the Pacific Coast. The most difficult part of their trip was crossing the “Great American Desert” in the western part of the United States by horse and wagon. 　　The western desert can be very dangerous. There is little water and there are few trees. But the desert also has scenery of great beauty. Tall towers of red and yellow stone rise sharply from the flat, sandy valley floor. The scene has been photographed many times and often appears in movies and in TV. 　　In Arizona, man-made dams across the Colorado River have made two large lakes in the middle of the dry desert country. At lake Powell, the red stone arch(拱状) of Rainbow(彩虹) Bridge rises high above the blue lake. 　　There are few roads. Many areas of Lake Powell's shore can only be reached by boat or on foot. But hikers in this empty desert land sometimes find very old native American pictures; painted on the rocks. 　　In Death Valley California, the summer temperature rises to 130 - 165 degrees Fahrenheit(华氏的). There is less than two inches of rain each year. Death Valley is the lowest place in America－925 metres below sea level. In 1800s, many travellers died when they tried to cross this waterless valley in the terrible heat. 　　Although the desert is dry and seems empty, there is plenty of life if you look closely. Small insects, snakes, and rats have learned how to live in the desert heat. They live underground and come out at night, when it is cool. Plants such as cacti(仙人掌) need very little water. When it does rain in the desert (sometimes only once or twice a year), plants grow quickly, and flowers open in a single day. For a short time, the desert is covered with brilliant colours. 1．In the 19th century, Americans moved from the east to the west because they ________. [　　] A．enjoyed the trip B．wanted to make their home there C．wanted to find new grassland there D．had no water to drink 2．From the passage, we can conclude that ________ [　　] A．the western desert is a good place for people to live in B．there is little water but there are many trees in the desert C．the desert is dangerous but it is full of beauty D．till now, people know little about the desert 3．If you want to find some old native American pictures painted on the rocks you must travel ________. [　　] A．on footB．by boat C．by carD．by plane 4．In the 1800s many travellers died in Death valley because of ________. [　　] A．illnessB．high temperature C．cold weatherD．poisonous water 5．In the desert, animals will die ________. [　　] A．if they move about B．if they drink much water C．if they come out at night D．if they can't make holes underground