题目内容

保证普通螺纹的互换性，主要考虑可旋合性。

A. 对
B. 错

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为了确保螺纹的旋合性和联接强度，必须规定螺纹中径公差。

A. 对
B. 错

试述阿米巴肝服肿的致病机制。

简述消化道溶组织阿米巴阿米巴与结肠内阿米巴的鉴别要点。

A--avoid loose clothingJ--shut down machines when not in useB--install safety guardsK--store chemicals correctlyC--keep workplace cleanL--store your tools after useD--know evacuation routesM-- turn off machines in between jobsE--know how to lift heavy loadsN-- wash handsF--know machine operating procedureO--wear protective uniformG--never reach into running machinesP--wear safety glassesH--place trash in proper containersQ--use two-handed operationsI--report any unsafe conditionsE下ample：（D）熟悉疏散路线（F）掌握机器操作程序( )保持工作区域清洁 ()工作间隙关闭机器