（），不仅较省力，而且也不易损伤电缆外护套，同时电缆托架也易于整齐排列、无挠度、外形美观、易于防火。
参考答案：电缆支架敷设
-________ doesn't always happen as we expect.
-Really! So we mustn't take the impossible things as our aims in case that we might be disappointed in
future.[ ]
A．Anything
B．Everything
C．Nothing
D．Something
中国人民武装警察部队设（）级领导机关。
A、二
B、三
C、四
D、五
