题目内容

佝偻病是缺乏（）所致。

A. 钙
B. 磷
C. 维生素D
D. 维生素A

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维生素E和硒缺乏后，都可引起（）。

A. 营养性肝坏死
B. 雏鸡渗出性素质
C. 肌肉营养不良
D. 脑软化

草木樨中含有香豆素，在微生物作用下可转变成（），与维生素K具有拮抗作用。

[音频]Listen and fill in the blanks with the missing words.My 1)__ food is fried rice with vegetable and chicken curry eiyh salad. The rice is first 2) in water and then fried with some chicken and vegetables. The chicken curry is 3) separately using some spices and chicken, and the salad is made of small 4) of vegetables and fruits. Finally, these three things are 5)_ together.I like this food because it is very 6). Also, this 7) is rich in nutrition and tastes. What's more, it is not 8)____ and easy to prepare.A.expensiveB.healthyC.piecesD.favouriteE.preparedF.dishG.servedH.boiled

无论在中午或傍晚,一支粉笔总是被看成白色,出现这一现象是由于( )

A. 知觉适应
B. 明度恒常性
C. 知觉的理解性
D. 颜色恒常性