The author suggests in the last paragraph that______.
A. establishing beneficial mother-baby relation needs scientific guidance
B. monkeys and humans have experienced similar evolution process
C. most of the mother-reared infants can grow up as healthy social beings
D. babies and infants need to be provided with a secure social environment
查看答案
《中国共产党廉洁自律准则》对党员和党员领导干部提出了“八条规范”，其中第八条是：廉洁齐家，()。
脆性材料是材料在外力作用下如（）等仅产生很小的变形即被破坏断裂的材料。常用的脆性材料有铸铁、陶瓷、石材、玻璃。
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