题型:问答题 简答题 —What about Mr. Wang's speech?—Wonderful. _____ people went there and were impressed by his speech.[ ]A. The number of B. Lot ofC. A number of D. A lots of 查看答案
题型:问答题 简答题 图甲是反射弧结构模式图,a、b分别是放置在传出神经元和骨骼肌上的电极,用于刺激神经和骨骼肌;c是放置在传出神经元上的电表,用于记录神经兴奋电位变化。请分析回答下列问题:该反射弧的传入神经元静息时,膜内Na+浓度将()(高于、低于、等于)膜外。 查看答案