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【单选题】
为使下图电路中的锗晶体管工作在临界饱和状态( U CE =-0.3V ), R C 应取值为 KΩ(保留1位小数)?
A.
3.4
B.
4.4
C.
5.4
D.
6.4
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参考答案:
举一反三
【简答题】向量的两要素是:大小和
【多选题】下列关于圆柱体不正确的是
A.
母线是直线
B.
母线与回转轴相交
C.
圆柱体上点的投影可以采用纬圆法求解
D.
圆柱体上点的投影可以采用直素线法求解
【判断题】大小和方向是确定向量的两要素
A.
正确
B.
错误
【单选题】Suppose that the current exchange rate is £1.00 = $2.00. The indirect quote, from the U.S. perspective is
A.
£1.00 = $2.00.
B.
£1.00 = $0.50.
C.
£0.50 = $1.00.
D.
None of the above
【单选题】○1-----○13轴立面图与平面不符的是( )。
A.
雨篷
B.
防火挑檐
C.
入口大门
D.
四层窗
【单选题】My father began to work ______ a bus driver when he was 20 years old.
A.
for
B.
to
C.
at
D.
as
【简答题】向量的两要素是( )和( )?
【单选题】When he was 20 years old, his dream to be a singer _____. [     ]
A.
  come true
B.
  achieve
C.
  hold on to
D.
  came true
【单选题】How many languages could Benny speak when he was 20 years old?
A.
2
B.
5
C.
1
D.
3
【简答题】He a model ship out of wood when he was 20 years old.A. built
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