潜油电缆做电缆头气密性试验时，试验压力为（）。
A、0.4MPa
B、0.8MPa
C、1.2MPa
D、1.6MPa
参考答案：A
No matter how frequently _____, the works of Beethoven always attract large audiences. [ ]
A. being performed
B. to be performed
C. performed
D. performing
数控地址键G，表示准备功能。( )
