压力容器发生火灾等直接威胁压力容器安全运行时，操作人员应立即采取紧急措施。（）
A.对
B.错
参考答案：A
----Where ____ the dictionary? I can't see it anywhere.
----I ____ it right here. But now it's missing.
A．did you put; have put
B．have you put; put
C．had you put; was putting
D．were you putting; have put
社会主义核心价值体系是社会主义中国的（）。
A.指导思想
B.本质体现
C.精神旗帜
D.奋斗基础
