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【单选题】
下列关于钠泵的叙述,错误的是 。
A.
当细胞内 Na + 增多和细胞外 K + 增多时,可以激活钠泵
B.
钠泵的作用是维持细胞内外离子的不均衡分布
C.
缺氧不影响钠泵的活性
D.
钠泵的本质是 ATP 酶
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举一反三
【单选题】当两轴相距较远,且要求瞬时传动比准确,应采用()传动
A.
B.
C.
轮系
【单选题】当两轴相距较远,且要求瞬时传动比准确时。应采用( )传动。
A.
带传动
B.
链传动
C.
轮系
【简答题】Mother told me that she will come back(),maybe in a few weeks . A)long ago B)long before C)later on D)before long
【单选题】My mother told me a story every evening while we waited for father to close the shop and come home. The shop remained open till midnight. Bullock carts in long caravans arrived late in the evening fro...
A.
One might find unfavorable faults in the legal code in lawsuits.
B.
There were times when the cronies came to foolish decisions.
C.
The magistrates were serious and punctilious.
D.
Matters related to farming were of great interest to them.
【简答题】Two weeks before Christmas, Mother told me we were going to my grandmother's house for the holiday. Grandma and Uncle Henry lived on a farm some 15 miles out of town They had no electricity or running...
【简答题】完形填空。 Two weeks before Christmas, Mother told me we were going to my grandmother's house for the holiday. Grandma and Uncle Henry lived on a farm some 15 miles out of town. They had no electricity or ...
【简答题】完形填空。 Two weeks before Christmas, Mother told me we were going to my grandmother's house for the holiday. Grandma and Uncle Henry lived on a farm some 15 miles out of town. They had no electricity or ...
【单选题】当两轴相距较远,且要求瞬时传动比准确时,应采用 ( ) 传动
A.
B.
C.
轮系
【单选题】当两轴相距较远,且要求瞬时传动比准确,应采用( )传动
A.
B.
C.
轮系
D.
齿轮
【单选题】Raju and His Father's Shop My mother told me a story every evening while we waited for father to close the shop and come home. The shop remained open till midnight. Bullock-carts in long caravans arri...
A.
Sometimes during lawsuits, one side or the other tricked the law, probably by finding faults in the legal code which were favorable to themselves.
B.
There were times when the courts came to foolish decisions.
C.
Matters related to fanning were of great interest to them.
D.
The magistrates were ludicrous.
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