±800kV等电位作业人员对接地体的距离应不小于6.0m
题型：判断题
问题：
±800kV等电位作业人员对接地体的距离应不小于6.0m
题型：判断题
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 George Washington Carver was born in 1864. He was born a slave (奴隶). When he was still a baby, his mother was stolen. He was kept by his master. All his life George loved 1 . When he was only seven years old, he already knew so 2 about plants that people in his hometown called him "the plant doctor". George wanted to learn as much as he could, but there was no 3 for black children where he lived. When he was ten, he left home to find a town that would allow 4 children to attend school. He studied in Missouri and Kansas 5 he finished high school. All this time he had to work to 6 his own expense (费用). He worked as a cook and opened his own laundry. In 1890, George began college. At first he studied art, but he still had 7 of plants. He began to study agriculture (农业). After he graduated, the famous inventor Thomas Edison asked him to work in his lab but George 8 . He had other 9 . He started an agricultural organization for black students in Alabama. In those days, many 10 in the south grew only cotton. This was 11 to the soil (土壤). After a while the 12 would not grow as well. George Washington Carver wanted to help farmers in the south to grow plants like peanuts and sweet potatoes. These plants helped the 13 . Over the years he invented hundreds of ways to use these two plants. George Washington Carver invented so many things that he was 14 "The Wizard (能手) of Tuskegee". He died in 1943 at the 15 of 79. | ||||
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