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【单选题】
甲壳素(chitin)又名甲壳质、壳多糖、壳蛋白,是法国科学家布拉克诺( Braconno) 1811年从蘑菇中发现的一种有用的物质。有关专家认为,甲壳素是继蛋白质、脂肪、糖、维生素和微量元素外维持人体生命的第六要素。以下关于糖类、脂肪和蛋白质这三大营养物质的叙述正确的是 [     ]
A.
植物油不能使溴水褪色
B.
淀粉水解的最终产物是葡萄糖
C.
葡萄糖能发生氧化反应和水解反应
D.
蛋白质溶液遇硫酸铜后产生的沉淀能重新溶于水
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【简答题】In what ways do people cooperate in their conversations?(人大2006研)
【简答题】adj. 营养不良的
【单选题】应用那种清洗剂清洗车身()当车身有沥青、焦油、鸟粪等污物时。
A.
二合一清洗剂
B.
脱蜡清洗剂
C.
专用清洗剂
【单选题】In what ways do children suffer from television?
A.
They become the victims of social violence
B.
They spend hours watching television instead of doing school work
C.
The programs make the children lose interest in the world
D.
The programs make the children spend too much of their parents’ money
【简答题】In what ways do people cooperate in their conversations?
【单选题】What is this passage talking about?______
A.
How to be a good leader.
B.
Several ways to do business.
C.
How to be a successful net worker.
D.
How to keep in touch with people.
【单选题】下列助剂中,不属于添加型阻燃剂的是( )。
A.
十溴联苯醚
B.
四溴双酚 A
C.
氢氧化铝
D.
红磷
【简答题】材料: When expenses are incurred the liability under this insurance shall not exceed the proportion of such expenses that the amount insured hereunder bears to the value of the Vessel as stated herein,o...
【单选题】下列关于呼吸运动调节的描述错误的是
A.
外周化学感受器位于颈动脉体和主动脉体
B.
缺氧可通过刺激外周化学感受器使呼吸加深、加快
C.
.酮症酸中毒时呼吸中枢反应是呼吸加深加快
D.
调节呼吸运动最重要的化学因素是二氧化碳
E.
血液中二氧化碳浓度升高的作用是抑制呼吸中枢
【单选题】According to the passage, what people need to do is to______.
A.
find ways to make future access to the material possible
B.
use more traditional material rather than digital one
C.
archive digital publications instead of paper ones in libraries
D.
preserve today's pervasive form. of communication, e-mails
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