钢筋混凝土简支梁梁肋间距，在标准设计中，各种跨度的梁肋间距一律采用（）。

A、240cm

B、220cm

C、200cm

D、180cm

Why Mclean killed Shean Paul().

A. Paul was not polite to him.

B. Paul had an affair with his wife.

C. Mclean found Paul was stealing his car.

D. Paul killed his wife Erin Mclean.