题目内容

萃取法是分离，提取或纯化各类有机与无机化合物的重要手段。

A. 正确
B. 错误

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柴油机燃烧室按结构形式可分为统一式燃烧室和分开式燃烧室两类。

A. 正确
B. 错误

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仓储技术装备按照作业方式分为搬运机械设备、起重吊装机械和存取设备。

A. 正确
B. 错误

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A conscious victim who has suffered a blow to the head has symptoms that indicate the possibility of concussion. If the patient feels no indication of neck or spine injury，recommended treatment would include（）.

A. turning the victim's head to the side to keep his airway open
B. positioning the victim so the head is lower than the body
C. giving the victim water if he is thirsty，but no food
D. elevating the head and shoulders slightly with a pillow

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加油机的电源安装要求有哪些？

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萃取法是分离，提取或纯化各类有机与无机化合物的重要手段。

A. 正确 B. 错误

柴油机燃烧室按结构形式可分为统一式燃烧室和分开式燃烧室两类。

仓储技术装备按照作业方式分为搬运机械设备、起重吊装机械和存取设备。

A conscious victim who has suffered a blow to the head has symptoms that indicate the possibility of concussion. If the patient feels no indication of neck or spine injury，recommended treatment would include（）.

加油机的电源安装要求有哪些？

A. 正确
B. 错误