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搜题
【单选题】
尿素中两个氨基来源于A.
氨基甲酰磷酸和谷氨酸
B.
氨基甲酰磷酸和谷氨酰胺
C.
氨基甲酰磷酸和天冬酰胺
D.
谷氨酰胺和天冬酰胺
E.
氨基甲酰磷酸和天冬氨酸
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皮皮学刷刷变学霸
举一反三
【简答题】蛋白质的基本组成单位是(),组成人体蛋白质的氨基酸共有()种,氨基酸在蛋白质分子中以()相连接。
【简答题】A．He doesn't have a computer. B．His computer needs to be repaired. C．He can't understand the instructions. D．He has a doctor's degree in computer science.
【简答题】三视图之间的位置关系:以主视图为基准,俯视图在它的____方,左视图在它的____方。三视图的“三等”关系:主、俯视图____,主、左视图____,左、俯视图____。
【单选题】How can people get across their points without misunderstanding and confusion?
A.
By using the simplest words and sentence structures in communication.
B.
By reducing the frequency of problems in the communicating process.
C.
By making vivid comparisons and giving as many examples as possible.
D.
By providing the listeners as much background information as possible.
【简答题】三视图与物体位置的对应关系，三视图之间的投影关系。
【单选题】Where do people usually get their international driving license?
A.
They obtain it in their home country．
B.
They obtain it while they arrive in Japan．
C.
They obtain it in a third country．
D.
They can buy one instead．
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