不锈钢管具有较高的电极电位、表面致密的氧化膜和均匀内部组织,以及很高的耐蚀性能。( )
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Failing memory ______ (使人很难回想起) all the basic kinds of information we take for granted.
What is Johnson's occupation now()
A. He is a salesman.
B. He is a newspaperman.
C. He is a manager.
D. He is a secretary.
引压导管的根部阀与U形管的连接短管不宜过长,以减少压力指示的迟缓。( )
A. 对
B. 错
热电偶(阻)安装在易受被测介质容易冲击的地方。( )
A. 对
B. 错