Events 【C4】______ the plant and animal affect its actions. Scientists recently found that a tiny animal called Siberian hamster changes the color of its 【C5】______ because of the number of hours of 【C6】______ . In shorter days of winter its fur becomes white. The fur becomes gray-brown in longer 【C7】______ of daylight in summer.
【C8】______ signals control other biological clocks. German scientists found that some internal one seems to order birds to begin their 【C9】______ flights two times each year. Birds prevented from flying become 【C10】______ when it is time for the trip. 【C11】______ they become can again when the time of the flight has ended. A mix of outside and internal events controls some biological clocks;such things as heartbeat and the daily change from sleep to walking take place because of both external and internal signals.
Scientists are beginning to learn 【C12】______ parts of the brain contain the biologicaI clocks. A researcher at Harvard University. Dr. Martin Moore Ede, said a small group of cells near the front of the brain seemed to control the 【C13】______ of some of our actions. Probably there are other cells to control other body activities. He is studying 【C14】______ they affect the way we do our work. Most of us have great difficulty if we 【C15】______ often change to different work hours. 【C16】______ call take many days for a human body to 【C17】______ a major change in work hours. Industrial officials should have a better 【C18】______ of biological clocks and how they affect workers. He said such an understanding could 【C19】______ sickness and accidents at work, and would help increase 【C20】______ .
【C1】
A.form
B.bloom
C.blossom
D.boom
第1题
初步鉴定B群链球菌的试验是 ()
A、马尿酸钠水解试验
B、CAMP试验
C、Optochin敏感试验
D、杆菌肽敏感试验
E、胆汁七叶苷水解试验
第2题
B群链球菌的初步鉴定试验是
A、山梨醇发酵试验
B、cAMP试验
C、Optochin敏感试验
D、杆菌肽敏感试验
E、胆汁七叶苷水解试验
第3题
初步鉴定A群链球菌的试验是 ()
A、杆菌肽敏感试验
B、胆汁七叶苷水解试验
C、CAMP试验
D、山梨醇发酵试验
E、Optochin敏感试验
第4题
初步鉴定B群链球菌的试验是
A、杆菌肽敏感试验
B、胆汁七叶苷水解试验
C、cAMP试验
D、山梨醇发酵试验
E、Optochin敏感试验
第5题
可作为B群链球菌初步鉴定的试验是
A、CAMP试验
B、杆菌肽试验
C、Optochin试验
D、胆汁七叶苷水解试验
E、山梨醇发酵试验
第6题
B群链球菌的主要鉴定试验是
A.杆菌肽敏感试验
B.CAMP试验
C.马尿酸钠水解试验
D.OPTOCHIN试验
E.胆汁七叶苷水解试验
第7题
A群链球菌的主要鉴定试验是
A.杆菌肽敏感试验
B.CAMP试验
C.马尿酸钠水解试验
D.OPTOCHIN试验
E.胆汁七叶苷水解试验
第8题
A群链球菌的主要鉴定试验是
A.马尿酸钠水解试验
B.CAMP试验
C.Optochin试验
D.杆菌肽敏感试验
E.6.5%NaCl生长试验
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!