如图是反射弧的局部结构示意图,刺激c点,检测各位点电位变化。下列说法错误的是( )
A:若检测到b、d点有电位变化,说明兴奋在同一神经元上是双向传导的
B:兴奋由c点传导到e点时,发生电信号→化学信号→电信号的转换
C:a点检测不到电位变化,是由于突触前膜释放的是抑制性递质
D:电表①不偏转,电表②偏转两次
图中每个小方格表示边长是1厘米的正方形.
句型转换:(共20空,每空0.5分,满分10分)
Mr. Brown works on a farm. Mr. Green works in a park. But they don't know each other. Today is Sunday. Mr. Brown comes to the park. He feels tired. He wants to have a little rest. He sees a red chair under a tree over there. So he walks to the chair. Mr. Green is behind him. Mr. Green runs to the chair with a board when he sees Mr. Brown come to the chair. But Mr. Brown runs faster(更快) than Mr. Green. Then he sits on the chair. Mr. Brown is very happy. But Mr. Green doesn't say anything. He gives the board(板子) in his hand to Mr. Brown. It says, "Wet Paint(油漆未干). "