第8课 食物变质的原因与保存法 (网课练习)
Quiz
•
Science
•
6th Grade
•
Medium
LIM Moe
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15 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
*变得很软,没有弹性
*发出阵阵臭味
以上的说明最有可能是什么食物变质的特征?
鸡肉
面包
炒饭
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪项有关牛奶变质后的说明是正确的?
失去弹性
有块状物
颜色变黑
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪项不是已变质食物的特征?
带有异味
颜色会改变
带有咸味
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
为什么上述食物会变质?
酵母菌所引起
细菌所引起
微生物所引起
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
微生物可以在蛋糕生长,因为
有阳光和养分
有养分和水分
温度低和有养分
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪种微生物能使面包变质?
真菌
细菌
霉菌
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
为什么微生物会导致食物变质?
微生物改变了食物的酸度
微生物在食物上大量地繁殖
微生物使食物变硬
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