运动神经元病临床上兼有上和(或)下运动神经元的体征，表现为肌无力、肌萎缩、感觉障碍等症状及体征。
参考答案：错
Lanmon ________ here for almost ten years and he has many Chinese friends. [ ]
A. has been
B. left
C. has come
D. came
社会主义全民所有制经济为什么采取国家所有制的形式？
