【简答题】金属钛因为具有神奇的性能越来越引起人们的关注,是航空、宇航、军工、电力等方面的必备原料。已知钛原子的相对原子质量为 48 ,核电荷数为 22, 其质子数为 ________ ,核外电子数为 _______ , 中子数为 _______
【单选题】加大人力资源培育力度,要弘扬( ),营造劳动光荣的社会风尚和精益求精的敬业风气。
【单选题】The police stopped me the other day as I was driving home, because I was ______ the speed limit.
【判断题】The actuator speed is determined by a pressure reducing valve.
【简答题】七奇公司在初创时准备筹集长期资本5 000万元,现有甲、乙两个备选筹资方案,有关资料如表所示。 要求:试分别计算该公司甲、乙两个筹资方案的综合资本成本率,并据以比较选择筹资方案。
【单选题】加大人力资源培育力度,要弘扬( ),营造劳动光荣的社会风尚和精益求精的敬业风气。
【单选题】Speed of the actuator is affected by
A.
cross-section area of the cylinder
【判断题】The actuator speed can be reduced by a restrict valve.
【多选题】What kinds of actuator are there in actuation system?
A.
Electromagnetic actuator
【简答题】The pressure of the hydraulic system is decided by , and the movement speed of the actuator is decided by .