受教育程度的提高可使父母对生育子女的注意力集中在什么上（） ["孩子能否健康成长","孩子能否传宗接代","孩子的未来发展和事业成就","孩子能否受到良好的教育","孩子能否成为防老养老的经济保证"]
Which of the following are policies applied to discount promotions？（） ["If multiple discounts could apply to a given product\/item， the promotion with the highest priority will be chosen.","If multiple discounts could apply to a given product\/item， the promotion with the largest amount off will be chosen.","If more than one order level discount could apply to an order， the discount with the highest priority will bechosen.","If more than one order level discount could apply to an order， the discount with the largest amount off will be chosen.","If discounted shipping and another type of order level discount could apply to the same order， both are applied."]
反渗透的进水标准水温为（） ["25℃","20℃","30℃"]
关于投资连结保险和万能保险的区别，正确的是（）。 ["万能保险一般提供最低保证利率，投资连结保险则否","万能保险的投保人承担全部投资风险，投资连结保险的投保人和保险人分担风险","投资连结保险在美国较流行，万能保险在欧洲国家较流行","投资连结保险的投资资账户资金可与其他保险资金混合使用，万能保险的资金必须与一般账户分开"]
下列哪一项是发现巨大血小板综合征的最简便试验（） ["血涂片上体积巨大（如小淋巴细胞）的血小板>50%","体内外血小板粘附试验减低","血小板聚集试验正常，但对Ristocetin无反应","单克隆抗体（AN51，SW2）证实缺乏GPI6"]
生态系统发展
