当机床液压系统工作压力较高、环境温度较髙时，适宜选用（ ）黏度的液压油。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='24899' and id < 2124684 and id<>'2124684' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24899' and id > 2124684 and id<>'2124684' order by id asc limit 5