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【单选题】
晶体管特性图示仪集电极扫描发生器输出的电压信号是( )。A.
三角波电压
B.
阶梯波电压
C.
脉冲波电压
D.
正弦半波电压
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举一反三
【单选题】Typhoon warning:Typhoon Cary 976 HPA at 28°30'N, 155°35'E moving northeast 12 knots. Maximum winds 70 knots near centre. Radius of over 50 knots 75 miles. Radius of over 30 knots winds 175 miles. Fore...
A.
967 hectopascals.
B.
976 hectopascals.
C.
679 hectopascals.
D.
796 hectopascals.
【单选题】S1:Avonport Port Control, this is MV Blue Whale. I am anchored clear of the fairway. What are my berthing instruction? When will my berth be clear? Over.S2:Blue Whale, this is Avonport. You berth will...
A.
to assist navigation.
B.
to assist embarkation.
C.
to make identification.
D.
to make alteration.
【简答题】物资调运方案的最优性判别准则是：当全部检验数()时，当前的方案一定是最优方案。
【简答题】骨折端的移位有成角移位、____移位、短缩移位、____移位、____移位。
【单选题】The latest storm warning information is as follows:tropical storm warning at 1330UTC. Hurricane Jane with central pressure of 987 hectopascals located in position 10°12'N, 119°31'E. Present movement N...
A.
smooth.
B.
moderate.
C.
rough.
D.
high.
【单选题】S1:Avonport Port Control, this is MV Blue Whale. I am anchored clear of the fairway. What are my berthing instruction? When will my berth be clear? Over.S2:Blue Whale, this is Avonport. You berth will...
A.
to wait for the large vessel to clear before entering fairway.
B.
to wait for the large vessel to clear after entering fairway.
C.
to wait for entering fairway after being noticed with the berth.
D.
to wait for entering fairway after the embarkation of pilot.
【单选题】Typhoon warning:Typhoon Cary 976 HPA at 28°30'N, 155°35'E moving northeast 12 knots. Maximum winds 70 knots near centre. Radius of over 50 knots 75 miles. Radius of over 30 knots winds 175 miles. Fore...
A.
Smooth.
B.
Moderate.
C.
Rough.
D.
High.
【单选题】The latest storm warning information is as follows:tropical storm warning at 1330UTC. Hurricane Jane with central pressure of 987 hectopascals located in position 10°12'N, 119°31'E. Present movement N...
A.
987 hectopascals.
B.
978 hectopascals.
C.
879 hectopascals.
D.
798 hectopascals.
【简答题】两个平面之间的中心投影变换,称为____。
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