七年级生物下册4.8.1《人类的食物》练习1(新版)北师大版.doc

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1、1人类的食物同步练习一、选择题1、在测定菠菜,梨中VC含量的探究活动中,分别滴加这两种汁液到同一浓度相同量的高锰酸钾溶液中使其褪色,滴菠菜汁液的滴数较多,这说明( )。A、菠菜中VC含量高 B、菠菜中VC含量低C、能使高锰酸钾褪色 D、不 能说明问题2、人体如缺哪种无机盐可引起贫血?( )A、含钙 B、含磷C、含碘 D、含铁3、平日我们所说的米面中,含量最多的营养物质是( )。A、蛋白质 B、糖类C、脂肪 D、维生素4、你认为贫血的人体内有可能缺乏的无机盐是( )。A、镁 B、锌C、铁 D、钙5、有些同学只爱吃肉,不爱吃水果和蔬菜,长此以往会造成身体缺乏( )。A、蛋白质和维生素 B、脂肪和无

2、机盐C、维生素和无机盐 D、蛋白质和脂肪6、常吃标准米、标准面能有效预防( )。A、夜盲症 B、脚气病C、坏血病 D、佝偻病二、填空题7、讨论下列饮食习惯有什么危害?(1)只喜欢吃肉,不喜欢吃蔬菜。(2)经常以方便面当主食。(3)不喜欢吃芹菜。8、食物中所的六大营养物质是:_、_、_、_、_和_。其中_和_属于无机物,糖类、脂肪、蛋白质和维生素属于_。9、三大产热营养素是_、_、_。10、细胞的主要组成成分是_,体内的养分等都必须溶解在_里才能被吸收利用。人体内的水约占体重的_左右。参考答案2一、选择题1、A 2、D 3、B 4、C5、C 6、B 二、填空题7、缺乏维生素 营养不良 缺乏维生素8、蛋白质 维生素 糖类 脂质 无机盐 水 无机盐 水 有机物9、糖类 脂肪 蛋白质10、蛋白质 水 70

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