多级压缩机最后一级气缸送出的气体温度低于单级压缩情况下所送出的气体温度。
参考答案：对
Kate won her first gold medal at the age of 7 .
A．when it was 7
B．when she was 7
C．at 7
D．when I was 7
银行汇票持票人向银行提示付款时，必须同时提交银行汇票和( )。
A．解讫通知
B．进账单
C．个人身份证
D．支款凭证
