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【单选题】
指导合成蛋白质的结构基因大多数为A.
单拷贝基因
B.
中度重复序列
C.
高度重复序列
D.
顺序
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举一反三
【简答题】关于防火墙作用与局限性的叙述，错误的是()。 A)防火墙有应用级网关、包过滤防火墙、状态监视防火墙三种 B)防火墙可以有效记录网络上的访问活动和进出内部网的通信量 C)防火墙可以阻止网络内部的攻击和病毒的感染 D)防火墙可以防止外部对内部网络的攻击
【单选题】It has been estimated that the earth's surface temperature has increased ______ one quarter to three fourths of a degree since 1850.
A.
by
B.
at
C.
to
D.
with
【简答题】辨析题: 商品价格低对消费者有利,商品价格高对生产者有利。这个说法对吗?为什么?
【单选题】It has been estimated that the earth's surface temperature has increased ______ one quarter to three quarters of a degree since 1850. ~
A.
to
B.
by
C.
at
D.
with
【简答题】完成对话: A:__________ me. Do you have any T-shirts? B: Yes. I'll__________ you! A: Here they are. B: Thanks. A: Do you like this T-shirt__________ that T-shirt, Li Ming? B: I want this one! A: Now we____...
【单选题】《晋祠之铭并序》碑制于唐贞观二十年(646年),是一通集史学、文学、政治、书法为一体的丰碑,是文笔俱佳的( )杰作,是一部研究、探讨盛唐时期的政治、文化、文学、书法艺术等方面的珍贵的“石史”。
A.
楷书
B.
行书
C.
隶书
D.
小篆
【单选题】What are baseball fans? Baseball fans wear their official team T-shirts and jackets everywhere, sometimes even to work. Then, whenever the team offers a free item, the fans rush to get it. In addition...
A.
Covering their walls with their team’s flags.
B.
Going to their team’s games as early as they can.
C.
Wearing their team’s official T-shirts and jackets.
D.
Knowing the favorite colors of their team players.
【简答题】安全钳与限速器配合使用完成超速保护,安全钳按动作过程分为 式和 式。
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