使用拉铆枪如遇钉芯未断裂可重复动作,亦可以强行扭撬。
A. 正确
B. 错误
其他条件相同的情况下,可交割券的票面利率越高,其转换因子越大。
A. 正确
B. 错误
电缆隧道一边有电缆支架时,通道宽度最小允许距离是1.2m。
A. 正确
B. 错误
Which characteristic of Halon is a disadvantage when it is used as a fire extinguishing medium?()
A. Leaves a residue
B. Cost,relative to other agents
C. Breaks down while under prolonged storage
D. Conducts electricity