【判断题】【消耗次数：1】
从小养成的好习惯是一生花不完的利息；从小养成的坏习惯是一生还不清的债务（）
①
正确
②
错误
参考答案：
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【单选题】
学前儿童养成良好的用眼习惯，以下说法正确的是（ ）
①
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②
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③
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④
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【单选题】
学前儿童养成良好的用眼习惯，以下说法正确的是（ ）
①
Normal 0 7.8 磅 0 2 false false false EN-US ZH-CN X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable
【单选题】
学前儿童养成良好的用眼习惯，以下说法正确的是（ ）
①
Normal 0 7.8 磅 0 2 false false false EN-US ZH-CN X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable
随机题目
【单选题】
若记材料强度的平均值为μf，材料强度的标准差为σf，材料强度取值的保证系数为αf，则材料强度标准值fk等于。
①
fk=μf-αfσf
②
fk=μf+αfσf
③
fk=μf
④
以上选项均不对
【单选题】
公式用于螺栓群轴心受剪连接验算，公式中的主要考虑。
①
以下描述均不对
②
在长度方向上，两端螺栓受力小，中间螺栓受力大
③
各螺栓受力相同，增加安全储备
④
在长度方向上，各螺栓受力不均匀
【单选题】
关于单桩竖向承载力，下列说法不正确的是()
①
取决于土对桩的支承阻力和桩身材料强度
②
一般由土对桩的支承阻力控制
③
一般由桩身材料强度控制
④
对于端承桩、超长桩和桩身质量有缺陷的桩，可能由桩身材料强度控制