视觉障碍常见的病因有()
A.脑神经疾病
B.脑部视觉通路疾病
C.眼肌疾病
D.免疫系统疾病
E.眼球运动通路疾病
参考答案:A, B, C, E
Mr. Li is not here, and you’d better call him ____3 p.m. ____ 5 p.m. tomorrow.
A.between; and
B.from; and
C.from; to
D.between; to
当消防车主要排气引水装置有故障时,才使用()。
A.水环泵
B.刮片泵
C.活塞泵
D.喷射引水泵