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【单选题】
分压式偏置共射放大电路,当温度升高时,其静态值Ibq会( )。A.
增大
B.
变小
C.
不变
D.
无法确定
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【单选题】Charon is the ( ) carrying the souls across the Styx.
A.
3-headed dog
B.
ferryman
C.
golden dragon
D.
horse
【单选题】Charon is the ( ) carrying the souls across the Styx.
A.
3-headed dog
B.
ferryman
C.
golden dragon
【单选题】为在地形上某两控制点间确定路线的导向线,此地形图的等高距为2m,比例尺为1:2000,拟定此段路线平均纵坡为4%,分规所张的开度应为( )cm。
A.
5
B.
3
C.
2.5
D.
2
【简答题】设置AutoCAD环境满足如下要求: (1)图形界限为A1大小,其中左下角坐标为(30,25); (2)设置3个图层,图层1红色,粗实线;图层2绿色,点划线;图层3黄色,虚线; (3)设置图层3为当前图层。
【单选题】Charon's boat indicates ( ).
A.
the way to the earth
B.
the way to the Olympus
C.
the way to the underworld
D.
the way to heaven
【单选题】When he was awake, she found she was lying on _______ seemed to be a piece of stone.
A.
that
B.
which
C.
what
D.
it
【单选题】对醌类酸性描述错误的是（ ）
A.
含羧基的酸性要比含两个 β -OH 的要强。
B.
萘醌及蒽醌苯环上的 β - 羟基的酸性强于 α - 羟基的酸性。
C.
酚羟基数目越多，酸性越强。
D.
根据醌类酸性强弱的差别，可用色谱法进行分离。
【单选题】Charon's boat indicates ( ).
A.
the way to the earth
B.
the way to the Olympus
C.
the way to the underworld
【单选题】[3-54]What kind of conditions would you observe as the eye of a storm passes over your ship' s position? ___ .当风暴中心经过你船位置时,你会观测到什么现象()
A.
Huge waves approaching from all directions, clearing skies, light winds, and an extremely low barometer. 大的浪从各个方向涌来,风力不大,气压极低
B.
Flat calm seas, heavy rain, light winds, and an extremely low barometer. 海面平静,大雨,轻风,气压极低
C.
Flat calm seas, heavy rain, light winds, and high pressure. 海面平静,大雨,轻风,气压高
D.
Huge waves approaching from all directions, clearing skies, light winds, and high pressure. 巨大的浪从各个方向涌来,天空晴朗,轻风,高压
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