It is said in Australia there is more land than the government knows             . [ ]

A.it what to do with    

B.what to do with  

C. what to do with it    

D.to do what with it

在病理形态学上，癌与肉瘤的主要不同点是（）

A．癌有较多的结缔组织间质

B．癌好发于老年人

C．癌多发生淋巴道转移

D．有癌巢形成，肿瘤实质与间质分界清楚

E．癌组织呈灰白色，质较硬