China’s plan _______ its installed nuclear power capacity by 20 percent this year shows that the country is developing new energy in an efficient way.

A．raised

B．to raise

C．raising

D．has raised

食管癌癌肿呈环形生长，阻塞症状出现早的类型是（）。

A.溃疡型

B.缩窄型

C.髓质型

D.腔内型

E.蕈伞型