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【单选题】
下列不属于天然石材的特性的是（）。A.
脆性材料
B.
抗拉强度低
C.
硬度小
D.
自重大
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反馈参考答案：
举一反三
【单选题】在有氧条件下,线粒体内下述反应中能产生FADH 2 步骤是:
A.
琥珀酸→延胡索酸
B.
异柠檬酸→ɑ-酮戊二酸
C.
ɑ-酮戊二酸→琥珀酸CoA
D.
苹果酸→草酰乙酸
E.
柠檬酸→ɑ-酮戊二酸
【单选题】Long Conversation 1 Why does the man wish to know Elizabeth?
A.
Because Elizabeth is the woman's friend.
B.
Because Elizabeth is a famous star in TV.
C.
Because Elizabeth is good at linear algebra ( 线性代数 ).
D.
Because Elizabeth is the dreaming-girl of the man.
【单选题】在有氧条件下,线粒体内下述反应中能产生FADH2步骤是 。
A.
琥珀酸→延胡索酸
B.
异柠檬酸→α-酮戊二酸
C.
α-酮戊二酸→琥珀酰辅酶A
D.
苹果酸→草酰乙酸
【简答题】串的两种最基本的存储方式是______和______。
【单选题】Long Conversation 1 Why is the man watching television?
A.
He's taking a break from studying.
B.
He has already finished studying.
C.
He was assigned to watch a program by his professor.
D.
He's finding out some information for a friend.
【单选题】在有氧条件下，线粒体内下述反应中能产生 FADH 2 步骤是：
A.
琥珀酸 → 延胡索酸
B.
异柠檬酸 →α- 酮戊二酸
C.
α- 酮 戊二酸 → 琥珀酰 CoA
D.
苹果酸 → 草酰乙酸
【单选题】CONVERSATION 1 Why did Emmanuel sign up for the University of the People?
A.
Because he couldn’t get any aid from his parents.
B.
Because he had no other options.
C.
Because he liked the courses it offers.
D.
Because it is tuition-free .
【单选题】Long Conversation 1 Why doesn't the man want to call Elizabeth?
A.
He and Elizabeth argued recently.
B.
He heard Elizabeth did poorly on the last test.
C.
He doesn't want to bother Elizabeth so late in the evening.
D.
He'd rather study in his own dormitory.
【单选题】当F +× F - 杂交时( )。
A.
F因子总不转移到F + 细胞中
B.
F - 菌株几乎总是成为F +
C.
基因重组的发生频率较高
D.
F因子经常插入到F - 细胞染色体上
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