Malthus proposes that when the population growth exceeds the food growth by far, the food is severely not enough and large-scale population death will occur in his book .
A. Principles of Political Economy
B. The Nature of Rent
C. An Essay on the Principle of Population
D. Classical Political Economy
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At the beginning, Europeans could not accept potato as food, but only for viewing.
A. 对
B. 错
In order to protect the interests of the British peasants, the Prime Minister Peel, Sir Robert abolished the Corn Law in 1846.
A. 对
B. 错
组成动植物体的化学元素约有60余种,按其在体内含量多少可分为( )
A. 常量元素和微量元素
B. 有机元素和无机元素
C. 常量元素和无机元素
D. 有机元素和微量元素
猪的口腔能够消化下列哪些物质
A. 淀粉
B. 蛋白质
C. 蛋白质、无氮浸出物、脂肪
D. 非蛋白氮
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