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【单选题】
Which generation came before Generation X?
A.
Generation Y.
B.
Generation Z.
C.
The baby boomer generation.
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【单选题】如图所示运算放大器电路,R1=10k,R2=20k ,输入电压ui=1v ,则输出电压uo 等于 ( ) 。
A.
2V
B.
-2V
C.
2.1V
D.
-2.1V
【单选题】小儿乳牙出齐的年龄
A.
1~1.5岁
B.
1.5~2岁
C.
2~2.5岁
【简答题】The wind () cold and raindrops fall
【判断题】海水腐蚀中,一般认为对于钢桩由于同时处于潮差区和全浸区,形成了宏观电池,潮汐区部分为宏观电池的阳极,因而腐蚀较重。
A.
正确
B.
错误
【单选题】小儿乳牙出齐的时间
A.
1岁-1.5岁
B.
1.5岁-2岁
C.
2岁-2.5岁
D.
2.5岁-3岁
E.
3岁-3.5岁
【单选题】______ is the most common cause of ice formation.
A.
The freezing of raindrops on contact with the vessel's structure
B.
Drastic fall in ambient temperature
C.
The deposit of water droplets on the vessel's structure
D.
Snowfall
【单选题】Geologists believe that ocean water came from
A.
comets.
B.
raindrops.
C.
volcanoes.
D.
other planets.
【判断题】The wind is cold and raindrops fall
A.
正确
B.
错误
【简答题】A.Formation of raindrops in the air. B.Formation of vapor water in the air. C.Development of air pollution. D.Increase of raindrops.
【单选题】如图所示运算放大器电路,R1=5KΩ ,R2=100KΩ, 输入电压ui=0.1V, 则输出电压等于 ( ).
A.
2V
B.
-2V
C.
2.1V
D.
-2.1V
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