问题
单项选择题
（）应装在空压机和压风管网之间。
A、风包
B、过滤装置
C、释压阀
D、卸荷阀
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
（）应装在空压机和压风管网之间。
A、风包
B、过滤装置
C、释压阀
D、卸荷阀
参考答案：A
WHEN John Gurdon was 15, he ranked last out of the 250 boys in his grade at biology. He also came in last for every other science subject. His teacher wrote in a : “I believe he has ideas about becoming a ; on his present showing this is quite foolish.” Luckily, the teacher’s words didn’t Gurdon’s love for science. He kept working hard. He went to lab earlier and left than anyone else. On Oct 8, 2012, 64 years later, the British professor the Nobel Prize for Physiology or Medicine. Japanese scientist Shinya Yamanaka had contributed to the research and therefore the award. Gurdon got the honor his research into cells and cloning. When he was studying at Oxford, he did some on cells. He took a cell from an adult frog, moved its , and put them into an egg cell. The egg cell then into a clone of the adult frog. His research for the first time that every cell in the body contains the same genes. At that time, many people accept Gurdon’s idea. But later it helped to Dolly the sheep in 1996, the first cloned mammal in history. It also led to important findings in the use of cells. For example, from someone’s skin can turn into any type of tissue in the body. This is good news for those who have diseased or damaged tissue. Gurdon always remembers the he had when he was 15. He even put the report on his desk as a daily to himself. “When you have , like an experiment doesn’t work, it’s nice to remind yourself that perhaps you are not so good at your job and the teacher may be ,” he said. However, the facts suggest Gurdon is pretty good indeed.
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