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【单选题】
有效数字的规则是
A.
四舍五入
B.
四舍六入五成双
C.
末位舍去
D.
有即进位
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【单选题】某家庭采用 ADSL 宽带接入方式连接 Internet , ADSL 调制解调器连接一个无线路由器,家中的电脑、手机、电视机、 PAD 等设备均可通过 WIFI 实现无线上网,该网络拓扑结构是:网络操作系统,是一种能代替操作系统的软件程序,是网络的心脏和灵魂,是向网络计算机提供服务的特殊的操作系统。
A.
环型拓扑
B.
总线型拓扑
C.
网状拓扑
D.
星型拓扑
【单选题】A burner responsible for producing black smoke in an automatic auxiliary boiler, would be caused by a _________.
A.
defective solenoid valve
B.
dirty fuel nozzle
C.
grounded high tension lead
D.
faulty ignition cable connector
【单选题】审美对象的核心是()
A.
B.
审美客体
C.
审美主体
D.
主观与客观
【多选题】客观精神说的核心观点:
A.
艺术是 “理念”或者客观“宇宙精神”的体现。
B.
艺术是 “自我意识的表现”,是“生命本体的冲动”。
C.
“文以载道”
【单选题】审美对象的核心是()。
A.
审美主体
B.
C.
审美客体
D.
主观与客观
【单选题】In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______.
A.
low firing pressure
B.
low exhaust temperature
C.
mechanical knock in each cylinder
D.
fuel knock in each cylinder
【单选题】High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by _____.
A.
engine overload
B.
low combustion temperature
C.
plugged fuel nozzle holes
D.
excessive compression pressure
【单选题】电子调谐器的最核心器件是 ( ) 。
A.
.三极管
B.
.电感
C.
.变容二极管
D.
.开关二极管
【单选题】When an auxiliary boiler is panting and emitting black smoke, you should _____.
A.
increase the fuel oil temperature
B.
decrease the fuel oil temperature
C.
decrease the fuel oil supply pressure
D.
increase the air supply
【单选题】Smog is something combined by smoke and fog. London is always known for its 'black fogs'. In the winter of 1952, a milky white fog rolled into the city. It soon turned into black smog as the smoke of ...
A.
smoke and fumes
B.
snow
C.
water drops
D.
fog
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