A:塔里木盆地
B:准噶尔盆地
C:柴达木盆地
39-13+47=____
63+25-39=____
56+42-69=____
92-37+4=____
80-49+27=____
34-25+14=____
Ken ________ his jacket in the gym. He has to get it back.
①A室的体积;
②B室从阀门K逸出的气体质量与原有质量的比.