在多级泵内无压力时,平衡盘和平衡环之间的轴向间隙为()。
A、0.1~0.2mm
B、0.1~0.3mm
C、0.1~0.4mm
D、0.1~0.5mm
参考答案:D
— _______ you _______ free tomorrow?
— No. I _______ free the day after tomorrow. [ ]
A. Are; going to; will
B. Are; going to be; will
C. Are; going to; will be
D. Are; going to be; will be
()是指监理单位的监理活动收入扣除直接成本、间接成本和各种税金之后的余额。
A.购货款
B.利润
C.总成本
D.投资额