学前儿童家庭教育的目的是：家长充分利用家庭优势和社区资源，创设良好的家庭环境，对学前儿童施以多种影响，培养学前儿童良好的生活习惯和自理能力，增强体质，激发求知兴趣，提高认知能力，掌握社会规范，塑造良好个性品质，发展审美能力，促进学前儿童身心全面、和谐、健康发展。
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The basic concept of GMDSS is（）.
A. Search and rescue authorities ashore will rapidly received an distress alert and acted upon
B. SAR units will be rapidly alerted to a distress incident and assist in a coordinated SAR operation
C. Ships navigating in the immediate vicinity of the ship in distress will rapidly alerted to the alert and give their help accordingly
D. The RCC will rapidly alerted to a distress alert through satellite and terrestrial communication techniques and conducted a rescue operation immediately
岗位抽样法的基本原理是（）
A. 概率论和数理统计
B. 概率论和会计
C. 概率论和工效学
D. 概率论和劳动定额学
端面多齿盘数为72，则分度最小单位为（）度。
A. 5
B. 9
C. 47
D. 32
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