铠装电缆一般用于（）敷设。
A、架空
B、管道
C、直埋
D、室内
参考答案：C
All the others seemed to know each other and I began to feel ____.
[ ]
A. given away
B. fallen behind
C. turned down
D. left out
出口生丝的重量按( )计量。
A．毛重
B．净重
C．公量
D．以毛作净
