【多选题】How can we reduce the unbalance hydraulic radial force on the gear shafts for gear pump?
A.
Enlarge the area of the outlet port
B.
Reduce the area of the outlet port
C.
Reduce the area of the inlet port
【简答题】水在液压油中含量过多造成的危害不包括_________。A. 使金属锈蚀B. 油氧化加快C. 执行机构动作迟滞D. 油乳化变质
【单选题】耐火等级为一级的高层建筑的以下构件中哪一个的耐火极限要求最高??(?)
【单选题】耐火等级为一级的高层建筑的以下构件中哪一种的耐火极限要求最高?
【单选题】水在液压油中含量过多造成的危害不包括 。
【单选题】耐火等级为一级的高层建筑的以下构件中哪一个的耐火极限要求最高?(?)[1分]
【单选题】How can we reduce the amount of carbon we use up? ( )
A.
Drive gas-guzzling vehicles.
B.
Take aeroplanes to go on holiday.
C.
Buy locally grown or produced food.
D.
Drive cars as much as possible.