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【单选题】
联合脱氨基作用是( )。A.
氨基酸氧化酶与转氨酶的联合
B.
转氨酶与谷氨酸脱胺酶联合
C.
转氨酶与谷氨酸脱羧酶的联合
D.
转氨酶与谷氨酸脱氢酶的联合
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【简答题】“救亡图存”口号的提出者是( )
【单选题】Why, when I was here last time we were quite alone, desperately alone, and we had been so for five or six months. We were poorly armed. We are not so poorly armed today; but then we were very poorly a...
A.
We were lack of weapons in the past days with no allies. We were under enormous threat from their continuous fierce attacks, but now we are equipped with better arms.
B.
We didn't have enough weapons in the past months, but now we are even in need of more weapons, as we are under huge attacks from the enemies, since they're so strong. We are still desperate.
【简答题】Why, when I was here last time we were quite alone, desperately alone, and we had been so for five or six months.
【简答题】在测定空气中氧气含量的实验中，小强采用了右图所示装置：在由两个注射器组成的密闭系统中留有25mL空气，给装有细铜丝的玻璃管加热，同时缓慢推动两个注射器活塞，至玻璃管内的铜丝在较长时间内无进一步变化时停止加热，待冷却至室温，将气体全部推至一个注射器内，观察密闭系统内空气体积变化。 （1）在实验加热过程中，交替缓慢推动两个注射器活塞的目的是 。 （2）写出该实验中反应的符号表达式 。 （3）小强测得实...
【简答题】在测定空气中氧气含量的实验中，小强采用了右图所示装置：在由两个注射器组成的密闭系统中留有25mL空气，给装有白磷的玻璃管微热，待打白磷开始燃烧后缓慢推动两个注射器活塞，直至反应停止，冷却至室温，将气体全部推至一个注射器内，观察密闭系统内空气体积变化． （1）在燃烧过程中，交替缓慢推动两个注射器活塞的目的是______． （2）写出该实验中反应的文字或符号表达式______． （3）小强测得实验结果...
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