题目内容
(请给出正确答案)
[主观题]
It was Thomas Alva Edison who ______ the electric lamp.A.discoveredB.inventedC.innovatedD
It was Thomas Alva Edison who ______ the electric lamp.
A.discovered
B.invented
C.innovated
D.found
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It was Thomas Alva Edison who ______ the electric lamp.
A.discovered
B.invented
C.innovated
D.found
第8题
A.自我强化
B.内部强化
C.替代性强化
D.负强化
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