She always ____________ Chinese at home. [ ]
A. says
B. talks
C. speaks
D. talk
答案:C
通常运行速度小于1.5m/s时,最小曲线半径应大于车辆轴距的()倍。
A.7
B.10
C.15
两台刮板输送机呈直线搭接时,后台机头要高于前台机尾()M。
A.0.3
B.0.2
C.0.1
D.1