问题 填空题

组成人体自身的元素有50多种,其中氧、碳、氢、氮几种元素以水、糖类、油脂、蛋白质和维生素的形式存在,其余元素以无机盐的形式存在。

(1)同质量的油脂、蛋白质在体内完全氧化时,放出能量多的是       

(2)食物淀粉在人体内与水发生一系列反应,最终变成葡萄糖,葡萄糖的化学式是         

(3)多数维生素在人体内不能合成,需要从食物中摄取,若缺乏         会引起坏血病。

答案

(1)油脂   (2)C6H12O6   (3)维生素C

同质量的油脂与蛋白质,油脂释放能量多一些,其中每克蛋白质完全氧化约放出18 kJ的能量,而每克油脂完全氧化释放39.3 kJ的能量;缺乏维生素C时,易引起坏血病。

单项选择题

Research on animal intelligence always makes me wonder just how smart humans are. (91) the fruitfly experiments described in Carl Zimmer’s piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly (92) to live shorter lives. This suggests that (93) bulbs burn longer, that there is an (94) in not being too terrifically bright.
Intelligence, it (95) , is a high-priced option. It takes more upkeep, burns more fuel and is slow (96) the starting line because it depends on learning—a gradual (97) —instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to (98) .
Is there an adaptive value to (99) intelligence That’s the question behind this new research. I like it. Instead of casting a wistful glance (100) at all the species we’ve left in the dust I.Q. wise, it implicitly asks what the real (101) of our own intelligence might be. This is (102) the mind of every animal I’ve ever met.
Research on animal intelligence also makes me wonder what experiments animals would (103) on humans if they had the chance. Every cat with an owner, (104) , is running a small-scale study in operant conditioning, we believe that (105) animals ran the labs, they would test us to (106) the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really (107) , not merely how much of it there is. (108) , they would hope to study a (109) question. Are humans actually aware of the world they live in (110) the results are inconclusive.

A.tendency

B.advantage

C.inclination

D.priority

名词解释