【简答题】某液压泵的转速为n=950r/min,排量V=168ml/r ,在额定压力p=30Mpa和同样转速下,测得的实际流量为150L/min,额定工况下的总效率为0.87,求:
【单选题】You just purchased some new switches for your company’s network. Your junior technicians are doing most of the work connecting switches to workstations and to each other, and you don’t want to confuse...
A.
Connect the switch to a PC NIC and configure different speeds on the NIC by using the NIC driver. You’re okay if the switch links at all speeds. It’s called auto-MDIX.
B.
Connect two switches by using a crossover cable. If the connection works, the switch supports auto-negotiate.
C.
Connect the switch to a PC NIC and configure different speeds on the NIC by using the NIC driver. You’re okay if the switch links at all speeds. It’s called auto-negotiate.
D.
Connect two switches by using a patch cable. If the connection works, the switch supports auto-MDIX.
【单选题】下列关于国债收益情况的说法中错误的是( )。
D.
价差收益是债券投资者买卖债券形成价差收入或价差亏损
【单选题】组织应在生产和服务提供期间对输出进行必要防护,下列哪些不属于输出防护 ( )。
D.
化工研究通过百度云向顾客传输的新产品配方信息
【多选题】用现代语音学的方法对音节进行分析,可以得出( )的内容。
【单选题】A switch has been configured for three different VLANs: VLAN2, VLAN3, and VLAN4. A router has been added to provide communication between the VLANs. What minimum type of interface is necessary on the ...
【简答题】将下列技术要求标注在图2.4-4上 1.φ35f8圆柱面应遵守包容要求。 2.大端为φ32的圆锥面对φ35f8圆柱轴线的圆跳动公差为0.015mm。 3.端面A的平面度公差为0.01mm。 4.面B对端面A的平行度公差为0.02mm。 5.φ35f8圆柱面的表面粗糙度参数Ra的最大值为0.4μm(未指明者皆采用默认的标准化值)。 6.面B的表面粗糙度参数Rz的上限值为6.3μm(未指明者皆采用默认...