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如图所示，一静止的均匀细棒，长【图片】、质量为【图片】，可绕通过棒的端点且垂直于棒长的光滑固定轴【图片】在水平面内转动，一质量为【图片】、速率为v=20m/s的子弹在水平面内沿与棒垂直的方向射入并穿过棒的自由端，设穿过棒后子弹的速率为v/3，则此时棒的角速度应为 rad/s。【图片】
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【单选题】A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch...
A.
Establish a direct link from the switch to all other switches in the network.
B.
Assign the switch a higher MAC address than the other switches in the network have.
C.
Configure the switch so that it has a lower priority than other switches in the network.
D.
Configure the switch for full-duplex operation and configure the other switches for half-duplex operation.
E.
Connect the switch directly to the MDF router, which will force the switch to assume the role of root bridge.
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【判断题】19 世纪末、20世纪初产生的古典管理理论,使管理活动从经验管理跃升到一个崭新的阶段。
A.
正确
B.
错误
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【单选题】Which statement correctly describes network security settings in Cisco Network Assistant for the Catalyst Express 500 Switch？（）
A.
The LOW setting enables broadcast storm control， but has no effect on the number of devices that can connect to a switch port
B.
The LOW setting enables broadcast storm control and limits the number of devices that can connect to a switch port.
C.
The LOW setting disables broadcast storm control but limits the number of devices that can connect to a switch port
D.
The default network setting is "HIGH"
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【单选题】丁香油酚结构简式为： ，下列关于它的性质说法正确的是(    )
A.
可与NaHCO 3 溶液反应放出CO 2 气体
B.
在碱性条件下可发生水解反应
C.
可与稀溴水发生取代反应
D.
既可燃烧，又可使KMnO 4 酸性溶液褪色
查看完整题目与答案
【单选题】维生素C的结构简式为【图片】，丁香油酚的结构简式为【图片】，下列关于这两种有机物的说法正确的是
A.
二者均含有酯基
B.
二者均含有醇羟基和酚羟基
C.
二者均含有碳碳双键
D.
二者均属于芳香化合物
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【单选题】下列关于软管的说法哪一个是不正确的（）
A.
异丁橡胶管适用于磷酸盐脂基液压油，但不适用于石油产品
B.
丁腈橡胶管适用于石油产品，但不适用于磷酸盐脂基液压油
C.
聚四氟乙烯软管可适用各种液压油
D.
氯丁橡胶管适用于芳香族汽油
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【单选题】“对氨基苯甲酸丁酯”是防晒霜中能吸收紫外线的防晒剂．下列关于“对氨基苯甲酸丁酯”的说法正确的是（　　）
A.
它的分子式是C 11 H 15 NO 2
B.
从有机物分类看，它可属于“氨基酸类”、“酯类”、“芳香烃类”
C.
它能与盐酸反应，但不能与苛性钠溶液反应
D.
甲酸丁酯基（-COOC 4 H 9 ）只有三种不同结构
查看完整题目与答案
【单选题】Before inserting a new switch in the network， the network administrator checks that the VTP domain name is correct， the VTP mode is set to server， and revision is lower than the switches in the networ...
A.
Because the configuration revision of the new switches is lower than the rest of the network， it can change the VLAN database of the other switches.
B.
As a VTP server， the new switch deleted all VLANs of the network.
C.
Erasing VLANs increases the VTP configuration revision.
D.
Since the configuration revision of the network is higher than the new switch， the VLAN database was automatically synchronized.
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【单选题】A user is unable to connect to the network. A network technician is able to determine that there is a problem on the switch. All other users on that switch are able to connect successfully to the netw...
A.
Switching loop is occurring on the switch.
B.
Wrong subnet mask on the switch.
C.
Incorrect SNMP settings on the switch.
D.
Port is misconfigured on the switch.
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【多选题】A new switch is installed in the Ezonexam network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. W...
A.
The switch that will share the VLAN information must be in the VTP Server mode.
B.
The switches must be in the same VTP domain.
C.
The switch that will share the VLAN information must be configured as the root bridge.
D.
The switches must be configured to use the same VTP version.
E.
The switches must be configured to use the same STP version.
F.
The switches must be configured to use the same type of ID tagging.
G.
The switches must be connected over VLAN trunks.
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相关题目：
【单选题】A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch...
A.
Establish a direct link from the switch to all other switches in the network.
B.
Assign the switch a higher MAC address than the other switches in the network have.
C.
Configure the switch so that it has a lower priority than other switches in the network.
D.
Configure the switch for full-duplex operation and configure the other switches for half-duplex operation.
E.
Connect the switch directly to the MDF router, which will force the switch to assume the role of root bridge.
查看完整题目与答案
【判断题】19 世纪末、20世纪初产生的古典管理理论,使管理活动从经验管理跃升到一个崭新的阶段。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which statement correctly describes network security settings in Cisco Network Assistant for the Catalyst Express 500 Switch？（）
A.
The LOW setting enables broadcast storm control， but has no effect on the number of devices that can connect to a switch port
B.
The LOW setting enables broadcast storm control and limits the number of devices that can connect to a switch port.
C.
The LOW setting disables broadcast storm control but limits the number of devices that can connect to a switch port
D.
The default network setting is "HIGH"
查看完整题目与答案
【单选题】丁香油酚结构简式为： ，下列关于它的性质说法正确的是(    )
A.
可与NaHCO 3 溶液反应放出CO 2 气体
B.
在碱性条件下可发生水解反应
C.
可与稀溴水发生取代反应
D.
既可燃烧，又可使KMnO 4 酸性溶液褪色
查看完整题目与答案
【单选题】维生素C的结构简式为【图片】，丁香油酚的结构简式为【图片】，下列关于这两种有机物的说法正确的是
A.
二者均含有酯基
B.
二者均含有醇羟基和酚羟基
C.
二者均含有碳碳双键
D.
二者均属于芳香化合物
查看完整题目与答案
【单选题】下列关于软管的说法哪一个是不正确的（）
A.
异丁橡胶管适用于磷酸盐脂基液压油，但不适用于石油产品
B.
丁腈橡胶管适用于石油产品，但不适用于磷酸盐脂基液压油
C.
聚四氟乙烯软管可适用各种液压油
D.
氯丁橡胶管适用于芳香族汽油
查看完整题目与答案
【单选题】“对氨基苯甲酸丁酯”是防晒霜中能吸收紫外线的防晒剂．下列关于“对氨基苯甲酸丁酯”的说法正确的是（　　）
A.
它的分子式是C 11 H 15 NO 2
B.
从有机物分类看，它可属于“氨基酸类”、“酯类”、“芳香烃类”
C.
它能与盐酸反应，但不能与苛性钠溶液反应
D.
甲酸丁酯基（-COOC 4 H 9 ）只有三种不同结构
查看完整题目与答案
【单选题】Before inserting a new switch in the network， the network administrator checks that the VTP domain name is correct， the VTP mode is set to server， and revision is lower than the switches in the networ...
A.
Because the configuration revision of the new switches is lower than the rest of the network， it can change the VLAN database of the other switches.
B.
As a VTP server， the new switch deleted all VLANs of the network.
C.
Erasing VLANs increases the VTP configuration revision.
D.
Since the configuration revision of the network is higher than the new switch， the VLAN database was automatically synchronized.
查看完整题目与答案
【单选题】A user is unable to connect to the network. A network technician is able to determine that there is a problem on the switch. All other users on that switch are able to connect successfully to the netw...
A.
Switching loop is occurring on the switch.
B.
Wrong subnet mask on the switch.
C.
Incorrect SNMP settings on the switch.
D.
Port is misconfigured on the switch.
查看完整题目与答案
【多选题】A new switch is installed in the Ezonexam network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. W...
A.
The switch that will share the VLAN information must be in the VTP Server mode.
B.
The switches must be in the same VTP domain.
C.
The switch that will share the VLAN information must be configured as the root bridge.
D.
The switches must be configured to use the same VTP version.
E.
The switches must be configured to use the same STP version.
F.
The switches must be configured to use the same type of ID tagging.
G.
The switches must be connected over VLAN trunks.
查看完整题目与答案