
食物的保存
Authored by LEONG Moe
Science
Professional Development
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
小美把牛奶盒子剪开时,发现牛奶已变质。她是根据什么特征断定牛奶已变质?
P 出现黑斑点
Q 出现泡沫
R 出现块状物质
S 牛奶变成褐色
P & Q
R & S
P & S
Q & R
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪种方法能保存一条刚从菜市买回来的新鲜鱼?
上蜡
冷冻
腌渍
真空包装
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪项是以上食物能保存更久的原理?
去除食物中的杂质
抽出食物中的水分
去除袋里的全部空气
让食物在彼此间没有空隙
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以上是熏制(食物保存法)的步骤。这种食物保存法的主要目的是什么?
使鱼熟透
使鱼脱水
增加鱼的鲜味
去除鱼的腥味
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下面的资料显示黄梨装罐的步骤。
R- 抽出空气,把罐子密封
S- 去除黄梨的外皮后,清洗果肉
T- 把黄梨装罐后,注入糖浆
U- 将罐子加热
S、U、T、R
S、U、R、T
S、T、R、U
U、S、T、R
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪组食物适合用巴氏杀菌法来保存?
苹果、咸鱼
鲜奶、茶叶
果汁、鲜奶
鸡肉、花生
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
上图显示一片被放在桌子上的面包
一个星期后,面包出现灰色斑点。为什么?
面包已经变成蛋白质
面包排出水分,导致表面潮湿
四周空气很干燥,使面包变干
微生物已经在面包上生长
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