题目

完形填空 A tornado is a rotating 1 of air from a thunderstorm to the ground. The most 2 has winds of more than 400 kilometres per hour.Tornadoes can 3 cars, trains and even houses and put them down in the next street or 4 in the next town. They can take the fur5 the back of a cat. They destroy houses, but 6 the furniture inside exactly where it was.7 , there are 800 tornadoes in the US each year, 8 about 80 deaths and 1,500 injuries. The worst tornado of all time occurred in 1925, 9 three US states. By the time it ended, more than 700 people had been killed and 2,700 had been 10 .11 下列说法中，正确的是（　　） A、在数轴上表示-a的点一定在原点的左边B、有理数a的倒数是1aC、一个数的相反数一定小于或等于这个数D、如果一个数的绝对值等于这个数的相反数，那么这个数是负数或零