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【单选题】
人类区别于动物的主要特征是A.
具有较强的适应环境的能力
B.
具有非条件反射和条件反射
C.
具有第一信号系统
D.
具有第一和第二两个信号系统
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举一反三
【单选题】While mother was in New Orleans, I was in the care of my grandparents. They were incredibly conscientious about me. They loved me very much sadly, much better than they were able to love each other or...
A.
his grandparents loved him more than his mother did
B.
his grandmother loved her grandson more than she loved her daughter
C.
his grandparents and his mother made him the most important person in the world
D.
his grandparents and his mother took him as the apple of their eye
【单选题】While mother ___ some washing, I ____ a kite for Kate.
A.
did, made
B.
was doing, made
C.
did, was making
D.
was doing, was making
【单选题】测得某放大电路中三极管各极电位分别是 0V 、 -6V 、 0.2V 则三极管的三个电极分别是( )。 A. B. C. D.
A.
(E 、 C 、 B)
B.
(C 、 B 、 E)
C.
(B 、 C 、 E)
D.
(B 、 E 、 C)
【单选题】测得放大电路中某三极管各极电位分别是2V、6V、2.7V，则三极管的三个电极分别是( )。
A.
(B、C、E)
B.
(C、B、E)
C.
(E、C、B)
D.
(B、E、C)
【单选题】While mother some washing, I a kite for my sister.
A.
did, made
B.
was doing, made
C.
was doing, was making
D.
did, was making
【单选题】测某放大电路中三极管各极电位分别是0 V、-6V、0.2V，则三极管的三个电极分别是( )。
A.
(E、C、B)
B.
(C、B、E)
C.
(B、C、E)
D.
(B、E、C)
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