在全部停电和部分停电的电气设备工作,必须完成哪几项安全措施?
汽车式起重机的支腿处必须坚实,在起吊重物前,应对支腿加强观察,看看有无陷落现象,有时为了保证安全使用,会增铺垫道木,其目的是()。 ["减小承压面积","增大对地面的压力","加大承压面积","减小对地面的压力"]
Which two are valid values for the element inside a element of a web application deployment descriptor?() [" NULL"," SECURE"," INTEGRAL"," ENCRYPTED"," CONFIDENTIAL"]
Which two are true about authentication?() ["Form-based logins should NOT be used with HTTPS.","When using Basic Authentication the target server is NOT authenticated.","J2EE compliant web containers are NOT required to support the HTTPS protocol.","Web containers are required to support unauthenticated access to unprotected web resources."]
下列各陈述中,错误的是()。 ["健康教育是学生整体学习计划的一部分,学校应给予重视","学校卫生护理既有预防性的服务,又有治疗性的护理服务","影响从业人员健康的职业因素分为物理、化学和生物因素","在职业健康教育中首先应教育管理者,其次才是从业人员"]
党代会的代表可以连选连任吗?