试题与答案

蔬菜水果中含有的天然抗氧化成分是（） A.淀粉酶 B.柠檬酸 C.生物类黄酮 D.醛

来源：www.tikuol.com
题型：单项选择题

题目：

蔬菜水果中含有的天然抗氧化成分是（）

A.淀粉酶

B.柠檬酸

C.生物类黄酮

D.醛类

E.延胡索酸

答案：

被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0506/a71fc4b1ac1dedfb22ad263f2ef2b28f.html

下面是错误答案，用来干扰机器的。

（1）BC （2）①论文攻克了当时的科学难题。板壳内禀理论是极有实用价值的科学难题，钱伟长从原有各学派学者的论述中找出各种板壳的内在联系，提炼出核心内容。②论文有极高的学术价值。此文发表于导弹之父冯?卡...

考点：营养与食品卫生(医学高级)营养与食品卫生综合练习营养与食品卫生综合练习题库
试题推荐
题型：阅读理解
阅读理解。

                                                    Captain Good Fellow
      Do your children enjoy interesting stories, funny games, and exciting dances?
     Captain Good Fellow will be ready to teach all these things to children at the City
Theatre on Saturday morning at 10:00, free.

                                                  Films at the Museum
      Two American films will be shown on Saturday afternoon at the Museum Theatre.
See Broken Window at 1:30. The Workers will be at 3:45. For further information,
call 4987898.

                                             Take me out to the Ballgame
     It's October, and Saturday night (7:00-9:00) is your last chance to see the Red
Birds this year.Get your tickets at the gate. It might be cold. Don't forget sweaters
and jackets.

                                          Do you want to Hear "The Zoo"
     "The Zoo", a popular rock group from Australia, will give their first US concert
this Saturday night, at eight in Rose Hall, City College.

                                                   International Picnic
     Are you tired of eating the same food every day? Come to Central Park on Saturday
and enjoy food from all over the world. Delicious and not expensive. Noon to 5:00pm.
1. On Saturday morning, you can _____.
[ ]
A. go to watch a ball game
B. take children to play games at the City Theatre
C. go to the Central Park for a picnic
2. The Red Birds ballgame _____.
[ ]
A. is in the afternoon
B. is outside
C. is at the gate
3. You can eat many different food from all over the world if you _____.
[ ]
A. go to the City Theatre
B. go to the Central Park
C. buy tickets at the gate
4. "The Zoo" is _____.
[ ]
A. a US concert
B. a park with many red birds in it
C. a music group
5. Mr. Turner wants to have a nice Saturday. Which is not possible for him to do? 
[     ]
A. Watching a ballgame and having a picnic.
B. Having a picnic and seeing a film.
C. Listening to a concert and watching a ballgame.
查看答案
题型：实验题

小强. 小明和小梅三同学在学习了木炭还原氧化铜的实验后，提出如下问题：“木炭与一氧化铅(化学式为PbO)反应生成铅的同时产生的气体一定全部为二氧化碳吗?”请你和他们一起对产物中气体的成分进行研究，并回答有关问题。

猜想：小强认为：反应产生的气体全部为二氧化碳。小明认为：反应产生的气体全部为一氧化碳。小梅认为：反应产生的气体既有二氧化碳又有一氧化碳。

设计实验：根据各自的猜想，他们共同设计了实验，实验装置如上图(他们在实验中进行了规范操作和细致的观察)。

(1)现象与结论：如果小强猜想正确，装置B. C中的实验现象是                      ；如果小明猜想正确，装置B. C中的实验现象是                         。如果小梅猜想正确，装置B. C中的实验现象是                         。

(2)此实验装置有不足之处，请你对该装置进行改进，具体措施是                                  。

(3)根据上述实验及学习的木炭与CuO. Fe2O3的反应，请你归纳出单质碳的一项重要用途是                   。

查看答案
微信公众账号搜索答案