危险作业通常都包括哪些作业？

A. 收发同步
B. 频率修正
C. 纠错
D. 区分同频小区

A. ignition may be delayed
B. fuel economy is not affected
C. exhaust gas temperature will be unchanged
D. the exhaust will be clear

A. 柱的纵向钢筋宜对称配置
B. 纵向钢筋间距不宜大于200mm
C. 柱总配筋率不应大于3%
D. 柱纵向钢筋的绑扎接头应在柱端的箍筋加密区

A. 正确
B. 错误