培训效果的核心评价要素是培训讲师。( )
参考答案：错
The Programming Counter (PC) is normally used to point out( ).
A．the address of next execution instruction
B．the address of last execution instruction
C．the address of current execution instruction
D．programmed execution instruction
矩形梁原设计采用HRB335级钢筋416，现拟用HPB235级钢筋代换，试计算需代换钢筋面积、直径和根数。
16，现拟用HPB235级钢筋代换，试计算需代换钢筋面积、直径和根数。