典型矽肺最常见和最重要的x线表现是

A．肺纹理增多、增粗

B．肺的阴影扩大

C．密度较高的圆形或类圆形阴影

D．胸膜肥厚、粘连

E．弥漫性肺气肿

(a) Compute the total profits before loss relief of Clouds Ltd in respect of each of the relevant accounting periods. (21 marks)