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【判断题】
酶的活性中心 是指酶分子中直接与底物结合,并和酶催化反应相关的部位活性中心,也称活性部位。A.
正确
B.
错误
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知识点：
皮皮学刷刷变学霸
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【多选题】抢护滑坡险情时，可通过（）等措施减小滑动力。
A.
清除滑坡体上部附加荷载
B.
削缓滑坡体上部边坡
C.
灌浆加固堤防
D.
防渗排水以减轻土重
E.
在滑坡体上抛石压重
【简答题】金属材料在外力作用下抵抗变形和断裂的能力称为()
【简答题】It seems that no matter when and where, a cat and a mouse just can't get along well. Cats always like to run after mice; therefore, whenever a mouse meets a cat, the mouse will try to run away as fast...
【单选题】Fishermen are dangerous in hurricane if they are at sea and do not get __________. 查看材料
A.
different labels
B.
windows and glass doors
C.
inland flooding
D.
early warning
E.
natural disaster
F.
a constant soeed
【单选题】Fishermen on the high seas have plenty of worries, not the least of which are boat tossing storms, territorial squabbles and even pirates. Now Boris Worm, a marine biologist at Dalhousie University in...
A.
fishermen are afraid of pirates and storms most.
B.
people should take measures to secure fish supply.
C.
about 50 years later, we won't be able to eat fish.
D.
Worm expects global catch data to continue surging.
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