Normally when we read our eyes flick backwards and forwards over the text.()
A. 正确
B. 错误
同年龄的近视眼者与正视眼比,近视眼的近点要比正视眼近。
A. 正确
B. 错误
We would be glad to receive your () export prices on the basis of CIF Shanghai.
散粮火车卸车装置使用中,发现现场灰尘过大,检查()系统。
A. 运转
B. 动力
C. 除尘
D. 输送