下列关于幼儿园教育的表述中正确的是（）。 ["幼儿园教育比家庭教育和社会教育更重要","大自然、大社会是儿童学科学的好场所，因此家庭教育和社会教育比幼儿园教育更重要","儿童上了幼儿园以后，家庭中的科学教育就不再重要了","幼儿园教育应该在各种教育力量的整合中居于主导地位"]
基尔霍夫定律
How does the weighty property of the GridBagConstraints objects used in grid bag layout affect the layout of the components？（） ["It affects which grid cell the components end up in.","It affects how the extra vertical space is distributed.","It affects the alignment of each component.","It affects whether the components completely fill their allotted display area vertically."]
合理的URL规则能使网站对于搜索引擎更加友好，请问以下哪项URL是合理的URL？（） ["http：\/\/www.xxx.com：80\/abc\/","http：\/\/www.xxx.com\/abc\/\/","http：\/\/126.156.58.6\/a\/b\/c","http：\/\/www.xxx.com\/abc"]
摄像机镜头安装方式有（） ["C","CS","BS","SC"]
简述学前儿童社会教育内容选择的原则。
