
science std6 食物的保存 lj
Authored by SUKD 2000619
Science
6th Grade
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20 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
以下是P食物变质后的特征。
1.有泡沫
2.有块状物
3.发出酸味
P食物是什么?
芒果
鱼
牛奶
蛋糕
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
面包在那种情况下最快变质?
放在潮湿的塑胶袋里
放在真空袋里
放在冰箱的冷冻格里
放在冷藏格里
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
以下显示一种食物保存法的特征。
1.在食物外层涂上蜡
2.食物没有接触到空气
上述食物保存法适合用来保存哪种食物?
鸡肉
稻米
苹果
生虾
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
干藏是为了让微生物失去哪项生长条件?
空气
阳光
养分
水分
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
什么是真空包装?
把食物放在完全没有空气的袋子里
把食物里的空气抽出,然后包装起来
把食物包好,避免空气接触到食物
把包好的食物放在没有空气的地方
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
以下资料和食物的保存法有关。
P-把食物浸在酸度高的地方
Q-把食物存放在温度0°C或以下的地方
R-把食物存放在温度10°C以下,0°C以上的地方
P,Q和R分别代表什么保存法?
P-冷藏 Q-冷冻 R-腌渍
P-冷冻 Q-干藏 R-熏制
P-干藏 Q-冷藏 R-熏制
P-腌渍 Q-冷冻 R-冷藏
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
用腌渍和盐腌来保存的食物有什么缺点?
食物的保存时间很短
长期食用会损害健康
食物里的水分大量蒸发
食物的表面会有一层蜡
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