---Do you often play computer games?

---No, And so do ________ of my classmates, you know we are very busy

A．three fourths

B．three four

C．third four

D．third fourths

当船舶发生碰撞或触礁时（）。

A．应由轮机员根据情况自行决定主机加油量

B．时刻检查各舱液位和进水情况

C．机舱受损进水时应立即加开一台发电机以增大电网的功率储备

D．船舶发生搁浅、擦底或触礁后，轮机人员应毫不犹豫执行船长命令