压力管道操作人员划分为6个级别，I-2级允许操作工业管道的级别为（）。
A、GC1、GC2、GC3
B、GC2、CC3
C、GC3
D、GBl
参考答案：B
Which of the following statements is NOT true about John McDermott
A．John McDermott was one of 15. men that entered the first Boston Athletic Association Marathon.
B．John McDermott was the first winner in the history of Boston Marathon.
C．An attendant rubbed John McDermott' s leg so as to get over the leg cramps.
D．John McDermott ranked 683rd in last year's Boston Marathon.
什么是短时记忆影响短时记忆编码的因素有哪些
