What do you think of when you hear the word "desert"? We usually think of deserts as hot, dry places. In fact, there are both hot and cold deserts in the world. Scientists defined deserts as areas of land where there are less than ten inches of rainfalls per year and there are few plants. In arctic and Antarctic regions, for example, there is very little rain. Precipitation is almost always frozen in the form of ice or snow. So these regions are considered deserts and given the special label "cold deserts." The low temperature there ranges from 10 to 50°F. in summer and from -50 to 10°F. in winter. _______
AIn arctic and Antarctic regions, there is very little rain.
BHot deserts, on the other hand, have high temperatures, usually over 75°F. in the daytime.正確答案
CBecause it stays frozen on the ground, plants cannot use it to grow.
DIn many hot deserts, the wind has blown away the sand, leaving bare rock, boulders, and gravel.
答案與詳解
