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【单选题】
下列哪一种单糖没有手性碳原子?
A.
甘油醛
B.
赤藓糖
C.
葡萄糖
D.
二羟丙酮
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【简答题】When she was awake , she found that she was standing on          seemed to be a piece of stone . A . that  B . which  C . what  D . it
【单选题】When she was awake, she found that she was       on       seemed to be a piece of stone.
A.
lying; that
B.
laying; which
C.
laying; it
D.
lying; what
【单选题】When she was awake,she found that she was standing on ______ segmed to be a piece of stone.
A.
that
B.
which
C.
what
D.
it
【简答题】A.She found that the line was always busy. B.She didn't bring any motley with her. C.She couldn't read the phone books. D.She didn't know her friend's phone number.
【单选题】在乙酸乙酯皂化实验中,使用铂黑电极的目的是:
A.
减小电极的极化
B.
不与反应物发生化学反应
C.
避免氢气析出
D.
避免氧气析出
【单选题】在乙酸乙酯皂化反应实验中使用的电极是:
A.
锌电极
B.
光亮铂电极
C.
镀铂黑电极
D.
铜电极
【简答题】请中翻西下列一段话 中国反对霸权主义、维护世界和平,主张通过协商解决彼此之间的纠纷和争端,不诉诸武力或以武力相威胁,不以任何借口干涉别国内政。
【判断题】高血压病主要引起全身大、中动脉硬化。
A.
正确
B.
错误
【单选题】When she was awake, she found that she was standing on ______ seemed to be a piece of stone.
A.
that
B.
which
C.
what
D.
it
【简答题】One morning, Wu Li discovered that her classroom had changed. She found that the desks were no longer in rows(排), but pushed together to make eight bigger desks. She was too excited about it for the f...
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