更多"A semiconductor is a material with "的相关试题:
[多项选择]下面是关于CMOS（ComplemeMAry MetAl-OxiDe SemiConDuCtor一互联型金属氧化物半导体器件）的描述，正确的有（）
A. CMOS是一个小型的RAM，功耗低，在外界电源切断时，由主板上的电池供电
B. CMOS中保存系统正常运行所需的参数，如果它们有误，计算机不能正常工作
C. CMOS中的数据用户不能重新设置
D. CMOS中的数据可以重新设置，但需要使用系统提供的专用程序SETUP
[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]The material used extensively as electrolytic protection around bronze propellers is（）.
A. Brass
B. Copper
C. Lead
D. Zinc
[名词解释]物质流通率 ratio of material flow
[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]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]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
[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]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]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]Oil is an important（）material which can be processed into many different products, including plastics.
A. uncovered
B. raw
C. fresh
D. crude
[单项选择]The internal force of a material, which tends to resist deformation when subjected to external forces, is known as （）.
A. stress
B. strain
C. shear strength
D. ultimate tensile strength
[单项选择]If ignited，which material would be a class B fire?（）
A. Magnesium
B. Paper
C. Wood
D. Diesel Oil
[单项选择]标有“Magnetized Material”字样的标签是（）标签。
A. 远离热源
B. 包装件向上
C. 深冷液化气体
D. 磁性物质
