> 为了检测食物中是否含有淀粉_新教科版小学科学四年级下册期末测试
推荐回答(1个)
性花9、下列动物是卵生动物的( )。
A、熊猫 B、兔子 C、蚕宝宝
10、生的食物会保留自身的营养成分,特别是( )不会被破坏。
A、蛋白质 B、脂肪 C、维生素11、为了检测食物中是否含有淀粉
,通常采用的方法是( )。
A、把食物放到水里搅拌
B、滴碘酒,观察颜色变化
C、滴酒精,观察颜色变化
12、矿物中硬度最大的是( ),硬度最小的是( )。
A、石墨 B、金刚石 C、黄铁矿
13、具有蜡烛一样的光泽的矿物是( )。
A、石英 B、长石 C、云母
14、化石一般存在于( )中。
A、岩浆岩 B、沉积岩 C、变质岩
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