更多"The material used extensively as el"的相关试题:
[单项选择]The material used extensively as electrolytic protection around bronze propellers is（）.
A. Brass
B. Copper
C. Lead
D. Zinc
[单项选择]The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
A. nonmagnetic
B. weatherproof
C. corrosion resistant
D. capable of being permanently affixed to the vessel
[单项选择]Stainless steel is material commonly used for temperatures up to 50℃; beyond that and for severe corrosive conditions other materials are requiredThe bold and italic word “that” probably means （）.
A. stainless steel
B. temperature
C. 50℃
D. other materials
[单项选择]Which material should NOT be used to secure cargo on deck for a voyage（）.
A. Steel chain
B. Wire rope
C. Steel strapping
D. Fiber rope
[多项选择] Open Shortes t Path First (OSPF) is a routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working group of the Internet Engineering Task Force (IETF). Which two statements best describe the OSPF link - state routing pro tocol?（）
A. OSPF sends updates every 10 seconds
B. OSPF sends triggered updates when a network change occurs
C. When a link state is changed, the router that detected the change creates a link - state advertisement (LSA) and propagates it to all OSPF devices using the 224.0.0.6 multicast address
D. OSPF sends summaries of individual link- state entries every 30 minutes to ensure LSDB synchronization
[单项选择]H3C IPS最近通过了微软的认证，加入了微软的MAPP（Microsoft Active Protections Program）计划，可以提前获得微软的漏洞信息；MAPP计划对合作伙伴要求非常严格，合作伙伴必须要提前进行相关技术部署，并在较短的周期内，准时给微软公司提交安全设备针对微软最新漏洞的防护情况，如果无法完成则会失去MAPP成员资格和提前获取微软公司漏洞补丁的特别待遇.以下有关MAPP计划说法错误的是（）
A. 作为MAPP计划的合作伙伴，H3C与微软公司的工程师一直保持着密切的技术合作关系，H3C在微软公司漏洞补丁发布之前，及时从微软公司获取各种安全漏洞信息，通过对漏洞的分析而生成相关产品特征库，下发到H3C的IPS等安全产品中，实现“零日攻击”的防范
B. 微软的MAPP合作计划可以作为厂商和产品的资质要求写入招标参数
C. H3C IPS已经有了卡巴斯基的合作证明和病毒库授权，不需要再有微软的MAPP认证
D. 通过MAPP认证，是国际知名厂商微软公司对H3C安全技术实力的认可，国内具有该认证的厂商屈指可数
[单项选择]Combustible material stored in a compartment adjacent to a compartment where there is a fire may be ignitedThis ignition can occur by （）.
A. heat convection through the adjacent bulkheads
B. combustion gases carried through the ventilation system
C. direct convection of the heat emitted by the adjacent fire
D. heat radiated from the dock or bulkhead by the adjacent fire
[单项选择]Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A. A safe-water buoy will display red and white vertical stripes of reflective material
B. All reflective material is white because it is the most visible at night
C. A special-purpose mark will display either red or green reflective material to agree with its shape
D. A preferred-channel buoy displays either red or green reflective material to agree with the top band of color
[单项选择]Personnel who are moving or handling material aboard ship should NOT follow which of the listed practices?（）
A. signaling that all personnel are clear before lifting or lowering material
B. Examining material for sharp edges or protruding points before handling
C. Closing, tagging, or securing valves that permit entrance of steam, water, or air into a fitting or other equipment
D. Throwing materials from high places to the deck
[单项选择]What material may be substituted for zinc when making a poured metal socket ending to a wire rope（）.
A. Lead
B. Babbitt
C. Solder
D. Nothing
[单项选择]Because of the high loads the bearing material is a tin- aluminum alloy bonded to a steel shellThe crosshead pin is highly polished to a （）.
A. flat surface
B. mirror finish
C. sloping surface
D. inclined surface
[单项选择]This kind of material expands（）the temperature increasing.
A. to
B. for
C. with
D. at
[单项选择]As time goes on the organic material is buried deeper and hence（）higher temperatures and pressures.
A. is made up of
B. is absorbed in
C. is exposed to
D. is known as
[单项选择]A semiconductor is a material with a （）.
A. conductivity higher than a normal conductor
B. conductivity higher than a normal insulator
C. high conductivity at low temperatures
D. low conductivity at high temperatures
[单项选择]The only cylindrical chart projection widely used for navigation is the（）.
A. Lambert conformal
B. Mercator
C. aximuthal
D. gnomonic
[单项选择]Navigational marks used for informational or regulatory purposes are（）.
A. solid yellow
B. white with orange geometric shapes
C. red and white vertically-striped
D. green and red horizontally-banded
[单项选择]Overflow valve is used to （）
A. control the fluid flow through it
B. prevent the pressure before it over the specified valve
C. make the pressure after it steady
D. control the direction of oil flow
