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【单选题】
红细胞膜上钠泵活动所需的ATP主要通过下列哪条途径来供给?A.
葡萄糖有氧氧化
B.
糖酵解和磷酸戊糖旁路
C.
脂肪酸β氧化
D.
氨基酸的脱氨基作用
E.
嘌呤核苷酸循环
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皮皮学刷刷变学霸
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【多选题】下列关于杂化轨道的叙述中，正确的是 [ ]
A.
分子中的中心原子通过sp 3 杂化轨道成键时，该分子一定为正四面体结构
B.
CCl 4 分子中有四个完全等同的sp 3 -pσ键
C.
杂化轨道一般只用于形成σ键或用于容纳未参与成键的孤对电子
D.
杂化轨道理论与VSEPR模型分析分子的空间构型结果常常相互矛盾
【简答题】完形填空。 I never knew how well Mother could keep a trust until I was going through her things after she died. I discovered something I had 1 forgotten, something that happened to as a child. One night, a...
【单选题】I knew how I could improve my English, _________ I didn’t have enough time to spend on it.
A.
and
B.
or
C.
as
D.
but
【简答题】Like many new graduates, I left university full of hope for the future but with no real idea of what I wanted to do. My degree, with honors, in English literature had not really prepared me for anythi...
【单选题】_____I knew how to operate an electronic computer as you do I could find a job.
A.
If only
B.
Only if
C.
What if
D.
Since then
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