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【简答题】
关于红外光谱的吸收峰，下面叙述正确的是( ) A．诱导效应使吸收峰向方向移动 B．物质分子发生互变异构时，吸收峰位置不发生变化 C．共轭效应使吸收峰向低波数方向移动 D．氢键的形成使吸收峰向方向移动
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举一反三
【简答题】用 and, but, so 连接下面的句子,必要时可加上人称代词 It rained hard all day went to bed early He'd seen the film before didn't like the ending We went out last night didn't mi...
【简答题】Years ago, we celebrated our oldest son’s first birthday by holding a super party. I spent months 1 , cutting out handmade banners(横幅) and all kinds of decorations. I kept 2 my husband’s work a...
【简答题】完形填空。 We were going to play a team from a country school. They didn't come until the time arrived. They looked l than we had thought. They were wearing dirty blue jeans antl looked like farm boy...
【判断题】The terms omputer chip,?icrochip,?and hip?originated as technical jargon for ntegrated circuit.?
A.
正确
B.
错误
【简答题】We were going to play a team from a country school. They didn't come until the match nearly 1 . They looked 2 than we thought. The wore dirty T-shirts and blue jeans and looked like farm boys. We thou...
【简答题】下图是人体内蛋白质翻译的一个过程， 据图回答： 可能用到的密码子：GAA—谷氨酸，UUC—苯丙氨酸，UGA—终止 CUU—亮氨酸，AAG—赖氨酸，ACU—苏氨酸 (1)图中所示mRNA须穿过________进入细胞质，在翻译过程中其作用是____________。 (2)合成多肽的原料是___________；图中[Ⅰ]________上所携带的氨基酸是_________。 (3)请按从左到右的顺...
【简答题】多级电压放大器级间耦合方式有[填空(1)] 耦合、[填空(2)] 耦合和[填空(3)] 耦合三种。A. 直接B. 变压器C. 阻容
【简答题】在蛋白质翻译过程中,携带密码子的是(),携带反密码子的是()。
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