[判断题]采煤工作面单体液压支柱要全部编号管理，牌号清晰，不缺梁、少柱。(　　)
A.正确
B.错误

On July 16,1960, Jane Goodall, a 26 -year -old former secretary from England, began to study the behaviour of chimpanzees in the wild. Until that time, scientists had mostly observed and studied chimpanzees in laboratories and zoos. Few scientists had gone to study chimpanzees in the remote areas of Africa where the chimps live. When scientists had studied the chimpanzees in the wild, they hadn’ t spent long periods of time observing them. Jane Goodall planned to watch chimpanzees in Africa over a ten - year period and see exactly how they behaved. She was not a professional scientist when she started out. Her book, In the Shadow of Man, tells how she began her project and what she discovered.
As Goodall said in 1973, "I had no qualifications at all. I was just somebody with a love of animals." Her love of animals drew her to Africa where she met Dr. Louis S.B. Leakey. Leakey was a world - famous scientist who was studying how prehistoric people li
A. Dr. Leakey studied chimps because he began to love the animals
B. after she met Dr. Leakey, Jane began to study the way that early people lived while observing chimpanzees
C. the country was very difficult to travel through
D. Jane worked with Dr. Leakey because she loved him