《超高压容器安全技术监察规程》规定，超高压容器筒体及主要受压元件超声检测灵敏度为φ2mm当量直径。
参考答案：对
---Do you think that Obama is honest and capable man?
---Yes. And that is why he was chosen president of America.
A．a;a
B．the; the
C．an;/
D．a;/
火灾自动报警系统的正常工作状态有两种：火灾自动报警状态和正常监测状态。（）
