(2013·四川省巴蜀名校一模)Everyone is different and that is ________ makes our world much better.

A．that

B．which

C．who

D．what

长于治疗寒痰咳喘，胸满胁痛的药物是

A．白芥子

B．紫苏子

C．杏仁

D．葶苈子

E．桔梗